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Subject: Disaster Preparedness and Resilience

  • Bihar flooded despite rainfall deficit; Nepal isn’t the reason

    Why in the News

    Bihar has flooded in a season of deficit rainfall. The State received 601.1 mm of rain between 1 June and 8 September, 27% below normal, and the Disaster Management Department recorded 2,157 villages across 14 districts affected. The Water Resources Minister has said this year’s flood pattern differed from previous years, with the Ganga rising first rather than the rivers that enter Bihar from Nepal. Discharge at the Valmikinagar Barrage on the Gandak stayed below what officials had expected, and the flooding continued anyway. The explanation offered is a backwater effect, so the immediate cause sits downstream in the main river rather than upstream across the border.

    What is a backwater effect?

    1. How a tributary drains: A tributary can discharge into a main river only for as long as the water level in the main river stays below its own.
    2. What happens when the main stem rises: A high stage in the main river holds the tributary’s water back and spreads it across the tributary’s own floodplain, with no additional rain falling there.

    Why did Bihar flood on a rainfall deficit?

    1. The seasonal shortfall: Rainfall from 1 June to 8 September was 601.1 mm, 27% below normal, and the deficit stood at 30% as late as 1 September.
    2. The month ran the other way: Rainfall during September itself was 31% above normal, so the cumulative figure conceals the period when the flooding worsened.
    3. Localised extremes: Individual rain events delivered 214.92 mm in East Champaran and 154.55 mm in Sitamarhi.
    4. The recorded damage: By 9 September the Disaster Management Department reported 2,157 villages in 14 districts affected and about 40.51 lakh people hit.
    5. Seasonal totals are the wrong measure: A flood is produced by the intensity and timing of rain and by upstream discharge, not by the season’s aggregate.

    How was this year’s flood sequence different?

    1. The usual order: The Bagmati, Kamla, Kosi and Gandak, which enter Bihar from Nepal, normally rise first, and the Ganga follows.
    2. What happened instead: The Ganga became the first source of concern this year, which inverted the sequence the State’s flood response is built around.
    3. The catchment is not local: The Ganga’s catchment extends far beyond Bihar, so it carries water generated by rainfall upstream, including in Uttar Pradesh.
    4. The stated drivers: The Disaster Management Department’s Principal Secretary identified rainfall around the Allahabad and Varanasi region and the resulting downstream discharge as important factors, with discharge from neighbouring States a major factor for the other rivers too.

    Why did opening the Valmikinagar Barrage not settle the Gandak?

    1. The gates were opened early: When floods hit Nepal on 26 August, Bihar opened all 36 gates of the Valmikinagar Barrage on the Gandak, which was then below its normal levels.
    2. The peak came in under expectation: Discharge at the barrage reached 1,50,200 cusecs (cubic feet per second, the volume of water passing a point each second) and then declined, below what officials had expected.
    3. Flooding continued regardless: The Gandak and the Punpun could not drain once the Ganga had swelled, which is the backwater effect at work.
    4. A second local input: The Punpun was also carrying heavy rainfall from Jharkhand.
    5. A flood travels: A river flood is a moving event, so a peak recorded at one gauge is transferred downstream and the flooded area is far larger than the area that recorded the heaviest rain.

    What do Bihar’s embankments do, and what do they not do?

    1. The length built: The State has built more than 3,730 km of river embankments.
    2. What they have protected: These structures have historically shielded around 3,600 sq km of land during floods.
    3. The limit of the structure: Embankments do not remove the underlying vulnerability of one of India’s flattest and most sediment heavy alluvial landscapes.
    4. Sediment raises the bed: The Ganga, Gandak, Kosi and Bagmati carry enormous quantities of sediment, and accumulation within a channel lifts the riverbed relative to the land beside it. Silt is a permanent condition of Bihar’s rivers rather than an event.

    Why has the Farakka Barrage entered the flood argument?

    1. The State’s contention: State leaders hold that the Farakka Barrage has trapped large volumes of silt along the Ganga over the five decades since it was built.
    2. The claimed consequence: That accumulation has made the riverbed shallower, so even normal seasonal monsoon flows now spill over the banks and produce annual flooding across the plains.
    3. A treaty deadline gives it timing: The 1996 India Bangladesh Farakka Treaty expires in December 2026, and demands in Bihar are for a review of the pact.

    What in Bihar’s own geography keeps exposure high?

    1. The rivers move: The Ganga, Gandak and Kosi constantly reshape their channels, so the land at risk is not fixed from one year to the next.
    2. People live at the water’s edge: High population density means many communities are settled close to rivers, and a rise in level turns into an evacuation rather than an inconvenience.

    Challenges to Bihar’s flood management

    1. An embankment concentrates risk at its weakest point: A breach releases water at high velocity onto land that the structure had kept dry for decades, so the damage is deeper than an unprotected flood. Eg. The Kosi breach at Kusaha in 2008 shifted the river’s course and displaced over three million people in Bihar.
      The Fix: Hold a pre positioned stock of boulders and geobags at identified weak reaches before each monsoon rather than mobilising material after a breach.
    2. Land behind the line cannot drain itself: An area sealed off from the river also loses the outlet for its own rainfall, so ground protected from flooding turns permanently waterlogged. Eg. Large tracts in the Kosi and Bagmati belts of north Bihar have gone out of cultivation from persistent waterlogging.
      The Fix: Build and maintain sluices and drainage channels through the embankment line with a fixed operating protocol for the monsoon months.
    3. Flood moderation depends on storage that does not exist: Peak attenuation on the Kosi and the Gandak requires reservoirs upstream in Nepal that have never been constructed. Eg. A high dam at Barahkshetra on the Kosi has been under discussion since the 1950s without being built.
      The Fix: Separate real time data sharing and joint forecasting from the dam negotiation, so warning improves without waiting on construction.
    4. Warnings are issued off levels already recorded: Forecasts rest on gauge readings at the moment of the peak, which leaves little lead time on terrain where water spreads sideways for tens of kilometres. Eg. A level based warning gives downstream districts only hours once an upstream gauge has crossed its danger mark.
      The Fix: Build district level inundation forecasts from upstream rainfall and barrage release data rather than from gauge readings alone.

    Conclusion

    Bihar’s flood risk is no longer set mainly by how much rain falls inside the State. It is set by the level of the main river the State has to drain into, and by channels whose beds have risen relative to the land beside them. The unresolved tension is that the structures protecting settled land also hold in the sediment that raises those beds, so each decade of protection shortens the next decade’s margin. What to watch is whether flood planning shifts from adding embankment length to sediment management, drainage behind the line and forecasting built on upstream data.

    Back2Basics: Farakka Barrage

    1. What it is and where: A barrage on the Ganga in Murshidabad district of West Bengal, commissioned in 1975, a short distance upstream of the border with Bangladesh.
    2. Why it was built: It diverts a part of the Ganga’s flow into a feeder canal to the Bhagirathi and Hooghly, to flush silt and maintain navigability for the port of Kolkata.
    3. A barrage, not a dam: It regulates and diverts flow through gates rather than impounding a large storage reservoir behind it.
    4. The water sharing arrangement: An agreement between India and Bangladesh shares the dry season flow measured at the barrage in ten day cycles between 1 January and 31 May.

    Matching Previous Year Question

    “[2024, GS3, 15 marks] What is disaster resilience? How is it determined? Describe various elements of a resilience framework. Also mention the global targets of the Sendai Framework for Disaster Risk Reduction (2015-2030).”

  • Disaster preparedness must put communities at centre

    Why in the News

    The catastrophe unfolding across Nepal is being read as a warning for the Himalaya and for mountain regions worldwide rather than as one country’s disaster. The reading rests on field research with disaster-affected communities in Nepal, including flood-affected elders, women, men and local leaders in Kharapani in the Pokhara Valley after the Seti River flood, and on separate field research on earthquake recovery in Kathmandu. Those communities reported inadequate warning, limited preparedness and delayed recovery support. They did not reject science or technology, and asked instead for warnings that function and for the equipment and training to act on them. The contest is between a preparedness system measured by its ability to detect the next hazard and one measured by whether the detection reaches a household with the authority and the means to move.

    Why does a mountain disaster become a regional problem?

    1. Mountains hold the water other regions live on: They store snow and ice, feed major rivers and sustain societies far beyond their own slopes.
    2. The physical base is changing across all mountain systems: From the Hindu Kush Himalaya to the Andes, the Alps and the Rocky Mountains, warming is altering glaciers, snowpack, permafrost and water flows.
    3. The consequences land downstream: Environmental change in the highlands cascades into social, economic and health crises in the plains that depend on those flows.

    What did flood-affected communities report?

    1. The loss was continuing rather than momentary: Residents described a long relational disaster covering the loss of relatives, homes, livestock and businesses.
    2. The damage extended past property: They described grief, disrupted livelihoods and frustration with the institutions meant to respond.
    3. Three failures were named: They reported inadequate warning, limited preparedness and delayed recovery support.

    What do affected communities ask for?

    1. Working warnings, not more instruments: Communities asked for functioning warnings, local flood-information centres, communication technologies, rescue equipment and preparedness training.
    2. An unread warning protects nobody: A warning that does not reach people, is not trusted, or is disconnected from evacuation and response plans provides no protection.
    3. The people at risk hold usable knowledge: Affected populations are knowledge holders and leaders in their own right, not recipients waiting for expert instruction.

    What five responsibilities does mountain preparedness now carry?

    1. Transboundary monitoring and data sharing: Glaciers, rivers, landslides and flood pathways cross political borders, so Nepal, India, China, Bhutan and other Himalayan countries need faster exchange of upstream observations, satellite information, river conditions and warnings. Scientific cooperation of this kind is life-saving regional infrastructure.
    2. Community-centred warnings: Information must reach people in trusted languages and forms, warnings must be tested, communities must know where to go, and women, elders, youth and marginalised groups must hold meaningful authority in preparedness decisions.
    3. Preparedness as a permanent public responsibility: Local information centres, evacuation plans, shelters, community response teams, health-system continuity and rescue equipment all require sustained investment rather than post-disaster allocation.
    4. Ecosystem-sensitive mountain development: Roads, tourism, hydropower and mining bring benefits, and poorly planned versions of each amplify exposure to the hazard.
    5. International climate responsibility: Nepal has contributed a tiny share of historical emissions and faces profound risk from a changing cryosphere, so climate finance, loss and damage support, scientific capacity and locally controlled adaptation are questions of justice rather than charity.

    Challenges to community-centred disaster preparedness

    1. The first responder tier is the least resourced: Panchayati Raj Institutions and urban local bodies carry the immediate response duty without matching funds, trained staff or defined roles. Eg. Relief work and maintenance of community assets sit with panchayats under the Eleventh Schedule, and States have devolved neither dedicated disaster staff nor untied funds against that entry.
      The Fix: Earmark a fixed share of the State Disaster Response Fund for village-level preparedness and train elected representatives through the National Disaster Management Authority and National Institute of Rural Development and Panchayati Raj modules.
    2. Spending is tilted towards relief rather than prevention: The disaster fund architecture keeps response funds far larger than mitigation funds, so preparedness competes for the smaller pool every year. Eg. India’s mitigation funds were created only after the response funds had been operating for years, and the tilt towards relief persists.
      The Fix: Move early warning systems, retrofitting and nature-based works into the National and State Disaster Mitigation Funds with a published annual drawdown target.
    3. Warnings fail at the last mile: Alerts are generated centrally and lose their audience before reaching the household, which is where the decision to move is actually taken. Eg. Real-time disaster information systems and last-mile dissemination remain uneven between States.
      The Fix: Test each warning chain through a drill that measures how many households received and acted on an alert, rather than how many messages were dispatched.
    4. Himalayan hazard data stops at the border: Glacial lakes, landslide dams and river surges form upstream of national boundaries, where the agencies that will face the flood have no observation rights. Eg. The South Lhonak lake outburst flood in Sikkim in October 2023 destroyed the Teesta III dam downstream and killed dozens of people.
      The Fix: Convert existing bilateral hydrological exchanges into a standing Himalayan hazard data protocol with fixed transmission times and a named receiving authority in each country.

    Conclusion

    Preparedness is being judged by the wrong instrument. Detection capacity has improved across the Himalaya; the authority to act on a detection still sits several administrative tiers above the people who must move. The unresolved tension is that the tier holding the legal duty to respond holds neither the money nor the staff to prepare, and the tier holding both is too distant to run an evacuation. Whether that changes is visible in one measurable thing over the next monsoon: whether any Himalayan State publishes household-level reach data for its warning system, instead of counting alerts issued.

    Disaster Management in India

    1. Where the mandate sits: The Ministry of Home Affairs oversees disaster management through its Disaster Management Division, which coordinates response, relief and preparedness for natural and human-made disasters, excluding drought and epidemics.
    2. A four-tier institutional structure: The National Disaster Management Authority is chaired by the Prime Minister, State Disaster Management Authorities by Chief Ministers and District Disaster Management Authorities by District Collectors, with primary responsibility resting on State governments.
    3. A fund architecture with four pillars: The National and State Disaster Response Funds finance relief, and the National and State Disaster Mitigation Funds finance risk-reduction projects.
    4. How resilience is defined: The Hyogo Framework for Action, 2005, defines disaster resilience as the capacity of a system or community exposed to hazards to adapt, by resisting or changing, so as to maintain an acceptable level of functioning.

    Laws and Rules Governing Disaster Management

    1. Disaster Management Act, 2005: It establishes structures and processes for disaster management at national, State, district and local levels, and mandates the creation of the National, State and District Disaster Management Authorities.
    2. Disaster Management (Amendment) Act, 2025: It modernises the 2005 framework for urban risk, climate extremes and data-driven response.
    3. It allows States to set up Urban Disaster Management Authorities in State capitals and Municipal Corporation cities. Eg. Karnataka’s authority for the Bruhat Bengaluru Mahanagara Palike.
    4. It mandates national and State disaster databases covering risk assessments and real-time disaster data.
    5. It gives statutory status to the National Crisis Management Committee and the High-Level Committee.
    6. Constitution (Seventy-third Amendment) Act, 1992: Article 243G empowers Panchayati Raj Institutions to prepare plans and implement schemes, and the Eleventh Schedule places relief work and maintenance of community assets among their functions.

    Government Initiatives for Disaster Preparedness

    1. National Disaster Management Plan: Issued in 2016 and revised in 2019, it is India’s first all-hazard plan aligned to the Sendai Framework.
    2. Disaster Management Plan of the Ministry of Panchayati Raj: Framed under Section 37 of the Disaster Management Act, 2005, it builds community-based planning from the village to the district panchayat.
    3. Aapda Mitra: It trains community volunteers in first response, search and rescue in disaster-prone districts.
    4. SACHET and the Common Alerting Protocol: They push multi-hazard alerts to every phone in an affected geography from one standardised feed.
    5. Coalition for Disaster Resilient Infrastructure: Launched by India in 2019, it is an international organisation of over 50 countries working on disaster-proofing critical infrastructure.

    Key Facts about Disaster Risk Reduction

    1. Sendai Framework for Disaster Risk Reduction, 2015-2030: Adopted at Sendai in Japan, it carries four priorities for action and seven global targets.
    2. The United Nations custodian: The UN Office for Disaster Risk Reduction anchors global disaster risk reduction and runs the Sendai Framework Monitor for reporting against the seven targets.
    3. India’s stated vision: The Prime Minister’s Ten-Point Agenda on Disaster Risk Reduction was announced in 2016 at the Asian Ministerial Conference.

    Matching Previous Year Question

    “[2024, GS3, 15.0 marks] What is disaster resilience? How is it determined? Describe various elements of a resilience framework. Also mention the global targets of the Sendai Framework for Disaster Risk Reduction (2015-2030).”

  • Lessons India, China, and Nepal must learn

    Lessons India, China, and Nepal must learn

    Why in the News

    A catastrophic flood in Nepal’s Rasuwa district, triggered by a glacial collapse near Langtang Lirung, has exposed vulnerabilities in Himalayan border management, infrastructure, disaster response and regional climate cooperation.

    Why does a border not contain a Himalayan disaster?

    1. A natural disaster does not recognise the line: The border as a geometric line, whose breach by another sovereign nation is treated as the uppermost national security concern, is not respected by a flood or an avalanche.
    2. Dependence-generating diplomacy no longer works: Nation states cannot afford to treat the sharing of information and expertise as a favour extended by one side to the other.
    3. Interdependence is the operating requirement: Data sharing, joint studies, institutional collaboration, non-sovereignty-centric treatment of climate change impact and a close inter-governmental early warning framework have become central.
    4. Science has to be converted into a public good: Translating findings into simple public awareness material is part of the same task.
    5. Border forces face a different threat set: Border defence personnel need retraining for security threats that now arrive as physical hazards rather than as incursions.
    6. Traditional knowledge belongs in operations: Human security in far-flung terrain depends on drawing on local knowledge in response operations rather than on external protocols alone.

    What does the flood expose in the region’s power system?

    1. Over 15 hydro projects were damaged on one river: The flood struck that many projects along the Trishuli, and the downstream exposure it created runs from national to trans-border scale.
    2. The cascade crosses four countries: Effects within Nepal, China and India, and further downstream in Bangladesh, can disrupt cross-border energy trading and regional power pools, producing energy insecurity.
    3. India’s oldest stake on the river is destroyed: India’s Central Water and Power Commission initiated the first hydel project on the Trishuli in 1953, an agreement was signed in 1958, and the 21 MW run-of-the-river project was commissioned at Tuphe in June 1972 at a cost of Rs 13.55 crore. It supplied power to Kathmandu for decades and now remains largely decimated.
    4. Highways were built along the river belts: Many China-built highways to Kathmandu run through valleys, including the 115 km Kathmandu to Kodari highway built in 1967 through the Sunkoshi valley, sited for strategic reasons and for easy access to sand and boulders.
    5. Ribbon development followed the alignment: Huge settlements have grown along those highways, which places population directly in the river’s path.
    6. Donors are reconsidering large infrastructure: This flood and others have pushed the funders of big infrastructure projects to rethink their strategies.

    Why does the response arrive from the wrong place?

    1. The first responder is the first victim: The impact falls at a very local level, where the area’s residents are both, and the response comes from distant capital-centric institutions in Kathmandu.
    2. Sikkim recorded the same pattern in 2023: Massive calving from the South Lhonak glacier’s snout triggered a glacial lake outburst flood in North Sikkim in October that year, and the Teesta rose 15 to 20 metres within hours.
    3. The damage crossed two States and a border: Downstream townships in Sikkim, West Bengal and Bangladesh were buried in slush and debris.
    4. The loss was 60 per cent of a State’s output: Damage was estimated at over Rs 25,000 crore, close to that share of Sikkim’s 2022-23 Gross State Domestic Product.
    5. Generation loss alone crossed Rs 19,000 crore: The 1,800 MW of capacity destroyed accounted for that much of the total.
    6. Local institutions had no capacity to absorb it: Municipalities and panchayats stood helpless before the scale of destruction, without training, technique, orientation, awareness, preparedness or the means to cope.
    7. No agency owned the warning function: No early warning mechanism existed, and no agency was responsible for creating one.
    8. The remedy named is relocation of capacity: National institutions and resources need to be based at the local level rather than at the capital.

    Why is there no common Himalayan climate policy?

    1. The region has no framework spanning its levels: The Himalayan region lacks a robust climate policy framework covering the local, national and regional levels together.
    2. The scientific warning is already published: The International Centre for Integrated Mountain Development (ICIMOD), the Kathmandu based intergovernmental knowledge centre for the Hindu Kush Himalaya, has published evidence-based reports warning of tipping points in the region’s deteriorating glaciology.
    3. India’s own instruments are national and sectoral: India has a National and State Action Plan on Climate Change with eight sectoral missions, including one for the Himalayas.
    4. The regional treaty exists on paper: The SAARC Convention on Cooperation on Environment was signed and took effect in 2013.
    5. The problem is fragmentation rather than absence: These scattered approaches have to be brought onto a common platform.

    Challenges to disaster preparedness in the Himalaya

    1. Disaster money is triggered by damage, not by risk: Spending flows overwhelmingly to relief and compensation after an event rather than to the monitoring and evacuation capacity that would reduce it. Eg. A separate National Disaster Mitigation Fund had to be created under the Disaster Management Act, 2005 precisely because response funds were not being spent on mitigation.
      The Fix: Ring-fence a fixed share of the mitigation fund for high altitude monitoring and evacuation infrastructure, with annual utilisation published State by State.
    2. Hill towns are built without a carrying capacity assessment: Settlements expand on slope debris and old landslide material without any study of how much construction the ground will bear. Eg. Land subsidence at Joshimath in January 2023 forced the evacuation of hundreds of families from a town built on old landslide debris.
      The Fix: Complete and publish carrying capacity studies for Himalayan towns, and hold new construction approvals until each town’s study is on record.
    3. No single agency owns glacier hazard: Glacier and glacial lake monitoring is split across geological, polar research and university institutions, so no body publishes a standing national risk list. Eg. India’s glacial lake inventories have been compiled separately by different agencies using different thresholds for what counts as a risk lake.
      The Fix: Designate one nodal agency to maintain and annually publish a national inventory of high risk glaciers and lakes.
    4. Reconstruction rebuilds the same exposure: Post-disaster funding restores roads, bridges and power projects on their original alignments, which returns the assets to the position that failed. Eg. Highways and hydel assets damaged in the 2013 Kedarnath floods were substantially rebuilt along the same valley routes.
      The Fix: Make a relocation-or-redesign assessment a condition of releasing post-disaster reconstruction funds for any asset in a hazard zone.
    5. Transboundary rivers carry no data obligation: Upstream flow, lake level and slope movement data are treated as strategic information rather than as a safety input owed to a downstream population. Eg. Countries in the region share river data under bilateral arrangements limited to defined seasons and defined stations.
      The Fix: Put glacier, lake and flow monitoring data into a standing regional exchange with agreed release timelines and an automatic alert threshold.

    Conclusion

    The Rasuwa flood underscores that Himalayan disasters demand cross-border cooperation, not isolated national responses. India must strengthen valley-level early warning systems, ensure real-time upstream data sharing, and establish clear institutional responsibility to prevent future disasters.

    Back2Basics: International Centre for Integrated Mountain Development

    1. Formation: An intergovernmental knowledge and learning centre established in 1983, with its headquarters at Kathmandu in Nepal.
    2. Membership: It serves eight regional member countries, namely Afghanistan, Bangladesh, Bhutan, China, India, Myanmar, Nepal and Pakistan.
    3. Coverage: Its mandate is the Hindu Kush Himalaya region, spanning the mountain systems from Afghanistan to Myanmar.
    4. Function: It produces regional assessments on glaciers, water, biodiversity and mountain livelihoods, including the Hindu Kush Himalaya Assessment reports.

    [2019, GS3, 10 marks] Disaster preparedness is the first step in any disaster management process. Explain how hazard zonation mapping will help in disaster mitigation in the case of landslides.”

  • Himalayas’ hanging glacier threat

    Himalayas’ hanging glacier threat

    Why in the News

    A Nature study identified 219 hanging glaciers in the Alaknanda basin, highlighting rising Himalayan flood risks as glacier instability assessments remain limited despite repeated major incidents.

    What is a hanging glacier?

    1. A perched ice mass: It is ice sitting on a steep slope in a position from which it can detach as a mass rather than melt away in place.
    2. Instability is defined by velocity: An unstable glacier is one whose velocity may change by an order of magnitude or more over a comparatively short period.
    3. The instability redistributes the ice: That change redistributes ice across the glacier, accompanied by geometric, structural and tectonic shifts, and the redistribution is what produces a hanging glacier on a steep slope.
    4. Detachment starts a chain rather than an event: A break-off can trigger secondary hazards such as a glacial lake outburst flood, where a lake dammed by loose moraine debris is breached and releases its water downstream.

    What did the Alaknanda inventory actually measure?

    1. 219 hanging glaciers in one basin: The study identified that number across the Alaknanda basin of the Garhwal Himalaya.
    2. The unstable ice clusters upstream: Nearly a third of it is concentrated in the Upper Alaknanda basin.
    3. The inventory carries area and volume: The glaciers cover 71.7 ± 3.5 sq km with an estimated ice volume of 2.39 ± 0.42 cubic km, including 0.74 ± 0.14 cubic km of hanging ice mass.
    4. The named driver is warming and variability: Himalayan glaciers are increasingly exhibiting geometric and dynamic instability owing to rapid warming and climate variability.
    5. The method is new to this range: Hanging glaciers have been studied extensively in the Alps, and basin scale assessments in the Himalaya remain limited.
    6. The work is Indian institutional: It was carried out by researchers at the School of Earth, Ocean and Climate Sciences at the Indian Institute of Technology Bhubaneswar and the Divecha Centre for Climate Change at the Indian Institute of Science, Bengaluru.

    What would a break-off do in the Badrinath and Mana sector?

    1. Simulated avalanche flows exceed 50 metres in height: The study’s simulations place flows above that height in that sector of Uttarakhand.
    2. Settlements sit directly in the path: A severe event on that scale would swallow major settlements and infrastructure.
    3. The exposed population is seasonal as well as resident: Badrinath is one of the Char Dham shrines and Mana sits at the head of the same route, so footfall peaks in the months when the slopes are least stable.

    Why is exposure rising faster than the ice is failing?

    1. Built exposure more than doubles by 2030: Buildings and infrastructure land area at risk in the basin is projected to be 120 per cent higher in 2030 than in 2000.
    2. The exposed population rises by 17 per cent: The number of people living in those at-risk areas is projected to surge by that share.
    3. Identification and monitoring are the first response: Systematic identification and monitoring of high-risk glaciers is what the study calls for to reduce downstream hazard.
    4. Land-use planning is the second half of it: Risk-informed land-use planning has to run alongside monitoring in mountain regions.
    5. Monitoring is cheap against the loss it prevents: Much greater funding of monitoring programmes is required, and that funding is small compared with the cost of lost lives and livelihoods, per the Director of the International Cryosphere Climate Initiative.

    What separated Chamoli from Blatten?

    1. Chamoli killed over 200 people in 2021: A massive wall of ice and rock collapsed into the Rishiganga valley, destroying hydropower plants and sweeping away bridges.
    2. Blatten killed one person: A large ice-rock avalanche buried most of that Swiss village four years later.
    3. The difference was preparedness, not luck: A second study published in Nature in March attributes the survival to preparedness, monitoring and rapid response.
    4. Precursory signs were acted on: Authorities and residents in Blatten responded to signs of slope instability, which enabled a timely evacuation.
    5. The hazards are cascading rather than isolated: These events should be treated as cascading hazards rather than as separate landslides, avalanches or floods, per the head of planetary sciences at the University of Aberdeen’s School of Geosciences.
    6. Attribution should not be rushed during the emergency: Establishing which process caused an event should not be hurried during the immediate emergency response.

    Challenges to monitoring hanging glaciers in the Himalaya

    1. The instrument network is sparse and seasonal: High altitude weather and movement sensors are few and go offline through winter, so precursor slope movement is unobserved in the months it develops. Eg. Glacier mass balance in India is measured on a handful of benchmark glaciers such as Gangotri and Chhota Shigri rather than basin wide.
      The Fix: Fund a permanently telemetered high altitude sensor network, with satellite radar interferometry as the standing backup layer.
    2. A hazard map does not bind a builder: Slope and glacier instability assessments are advisory inputs, so they do not stop an approval for a road or a power project below an unstable face. Eg. Construction continued in the Rishiganga and Dhauliganga valleys after repeated warnings about instability in those catchments.
      The Fix: Make valley level hazard zonation a statutory input to environmental clearance for any project above a set altitude.
    3. Warning does not reach the valley floor: An identified hazard produces a scientific alert rather than a siren in the settlement that would be hit. Eg. Workers at downstream barrage sites in the 2021 Chamoli event had no alert before the flood wave arrived.
      The Fix: Install siren based valley warning tied to the sensor network, with a mandated evacuation drill calendar for every downstream settlement and project.
    4. Pilgrim traffic concentrates people in the exposed months: The season when the route is open is the season when avalanche and outburst risk is highest, so peak exposure and peak hazard coincide. Eg. Char Dham footfall peaks between May and October, which is also the melt and monsoon window.
      The Fix: Route daily pilgrim entry against a published hazard advisory rather than against a fixed carrying capacity number alone.

    Conclusion

    The hanging glacier threat shows that Himalayan disaster risk is becoming a race between environmental instability and expanding human exposure. Continuous monitoring, enforceable hazard zoning, real-time warnings and evacuation preparedness can turn scientific knowledge into lives saved and resilient mountain development.

    Back2Basics: Alaknanda River

    1. Source: It rises at the Satopanth and Bhagirath Kharak glaciers in the Chamoli district of Uttarakhand.
    2. Status in the Ganga system: It is one of the two headstreams of the Ganga, and it carries the larger discharge of the two at their meeting point.
    3. Panch Prayag: Its five confluences are Vishnuprayag, Nandprayag, Karnaprayag, Rudraprayag and Devprayag.
    4. Formation of the Ganga: It joins the Bhagirathi at Devprayag, and the river takes the name Ganga from that point onward.

    [2020, GS1, 10 marks] How will the melting of Himalayan glaciers have a far-reaching impact on the water resources of India?

  • The mountains have sounded a warning, we ignore it at our peril

    The mountains have sounded a warning, we ignore it at our peril

    Why in the News

    Flash floods have swept down from the mountains on the Nepal Tibet border into Nepal’s Rasuwa district. A glacial lake outburst flood (GLOF) sent a massive avalanche of water and mud down the Lhende River about 20 km east of the Rasuwagadhi border crossing, sweeping away villages, settlements and a large number of people downstream. The avalanche may have been triggered by a 4.4 magnitude earthquake recorded in the area minutes earlier. At least six hydropower projects downstream were destroyed, costing Nepal 405 MW of capacity, which is 12 per cent of its national total. The tension is that the Himalaya has produced this exact sequence repeatedly, and hydropower schemes and hill tourism have expanded on the same valleys after each event. A second front has opened across the border, where China is building the Medog dam at the great bend of the Brahmaputra and hydrological information sharing with India has never been regular.

    What is a glacial lake outburst flood?

    1. How the lake forms: A mountain river upstream is blocked by a portion of a glacier breaking away or by an avalanche. The blockage impounds a lake behind it.
    2. How the lake bursts: The loose banks of that lake give way under water pressure, and a huge volume of water and debris then hurtles downstream through narrow valleys.

    What did the flood take out beyond the power projects?

    1. The path of the surge: The floods spread south from Rasuwa into the Dhading, Gorkha and Nuwakot districts of Nepal, and the impact carries across the border into India. Chinese media reported similar loss of life and property on the Tibetan side, in Gyirong county.
    2. Indian pilgrims caught in it: Over 160 Indian pilgrims are reported missing. The hotels and guest houses they were staying in were washed away in the flood.
    3. A trade and pilgrimage artery closed: Rasuwagadhi is the most important border crossing between Nepal and Tibet for trade and for tourism, including pilgrim tours to Kailash Mansarovar. Cross border trade and traffic are likely to remain suspended for the foreseeable future.
    4. The recovery horizon: Rebuilding the lost generating capacity may take several years, and it is a loss Nepal can ill afford.
    5. India’s immediate response: India sent urgent medical and food supplies to Nepal. It also despatched specialised rescue teams.

    How large is the hazard the Himalaya now carries?

    1. Glacier area: There are 48,000 sq km of glaciers spread over the Himalaya, and another 18,000 sq km sit in the Karakoram.
    2. Mapped lakes: Researchers have mapped over 5,000 glacial lakes in the Himalaya. About 500 of them are classified as hazardous or significantly hazardous.
    3. Recorded events: There have been at least 388 recorded GLOF instances in the Himalaya Karakoram mountains, and their frequency has been increasing in recent years.
    4. What these glaciers support: Himalayan glaciers are the source of the rivers that sustain the entire Indo-Gangetic plain, which is populated by over 500 million people.

    Why has the record of past disasters not changed construction in the valleys?

    1. Dharali, August 2025: A GLOF event at Dharali in Uttarakhand, on the route to Gangotri, caused large scale loss of life and property.
    2. Kedarnath, 2013: The Kedarnath flash flood was caused by a combination of torrential rains and a GLOF at Chorabari lake to the north. The surge of flood waters and debris washed away towns and settlements along the highway to Gangotri.
    3. The rules that followed it: There was talk of assessing and strictly observing the human carrying capacity of these remote pilgrimage places. No construction within 500 metres of the river banks was to be permitted thereafter.
    4. What actually happened: Hotels and guest houses have mushroomed once again on the river banks. No lessons have been learnt from the earlier event.
    5. The load on the shrine towns: During the pilgrimage season Kedarnath may see a daily turnover of 15,000 to 20,000 pilgrims.
    6. Construction at extreme altitude: Prefabricated guest houses, restaurants and dhabas operate even at 18,000 feet, with gas cylinders transported back and forth for heating and cooking. There are no proper arrangements for waste management.
    7. The direction policy is moving in: The Uttarakhand government is reportedly considering opening Badrinath and Kedarnath for pilgrimage the whole year round.

    What has hydropower already lost to these events?

    1. Teesta-III, October 2023: A GLOF from South Lhonak lake in Sikkim completely washed away the 1200 MW Teesta-III hydropower dam and power station.
    2. Rishiganga, 2021: A sudden flash flood triggered by a glacial collapse in Chamoli in Uttarakhand wiped out the Rishiganga hydropower project. It also blocked the associated Chamoli tunnel.
    3. The seismic overlay: Hydropower development continues apace in the Himalaya, which is a known active seismic zone, so the outburst risk and the earthquake risk compound each other.
    4. The response to the evidence: Major hydropower projects continue to be pursued across the mountain zone, creating mounting risks to life and property, and those risks are being cynically ignored.

    Why is the Medog dam a transboundary risk for India?

    1. Scale of the project: China has begun constructing the gigantic Medog dam at the great bend of the Brahmaputra river just across the border. It is slated to deliver 300 billion kWh of power annually.
    2. How large that is: The largest hydro project in existence anywhere in the world, the Gezhouba on the Yangzi River, is rated at 15.6 billion kWh of power annually.
    3. The fault line under it: Chinese scientists have warned that the project sits very close to the Paizhen Fault, a major fracture in the Earth’s crust, which makes it vulnerable to seismic events. A major earthquake in the project vicinity could send a massive discharge of flood waters and debris into India’s Northeast.
    4. The information gap: The sharing of information and early warning between India and China has never been regular. It has been subject to the state of their political relations.
    5. The wider river geography: Several rivers rise on the Tibetan plateau and flow through Nepal and India. Flash floods on some of these cross border rivers have already caused large scale damage on the Indian side.

    Challenges to GLOF risk management in the Himalaya

    1. Warning systems are built for the wrong signal: A system designed to track the gradual movement of glacial water cannot register a sudden wall of debris. Eg. The Bhote Koshi warning system did not detect the surge that hit Rasuwa. Fix. Pair water level gauges with seismic and acoustic sensors that read mass movement rather than a change in river stage.
    2. A hazard rating triggers no building restriction: Classifying a lake as hazardous carries no automatic consequence for what may be built below it. Eg. A 2021 study by scientists from IIT Roorkee, IISc Bengaluru and the universities of Dayton, Graz, Zurich and Geneva flagged instability around South Lhonak lake, and the lake burst two years later killing at least 50 people. Fix. Attach a mandatory downstream no build corridor to every lake a national risk index rates as high.
    3. Clearance is granted one project at a time: A chain of dams on the same river is appraised as separate schemes, so the cumulative surge risk down the valley is never assessed. Eg. The Alaknanda and Bhagirathi basins in Uttarakhand carry dozens of projects on hydrologically connected rivers. Fix. Require a basin level cumulative impact assessment before any new project is cleared in an outburst exposed valley.
    4. Monitoring authority is split across agencies: Glacier survey, weather forecasting and dam safety sit with different bodies, so no single office can order action on a lake that is filling. Eg. The National Disaster Management Authority (NDMA) has itself proposed an integrated glacier monitoring authority coordinating the Geological Survey of India, the India Meteorological Department (IMD) and the Indian Space Research Organisation. Fix. Create that authority and give it the power to direct downstream evacuation.
    5. Nothing tests a dam that is already built: Outburst assessments became mandatory for new dams only after the Sikkim event, and existing designs are under review rather than under obligation. Eg. The requirement followed the loss of a 1200 MW station rather than preceding it. Fix. Set a dated deadline for retrofitting or de-rating existing Himalayan dams that fail a surge simulation.

    Conclusion

    The hazard sits in one country and the damage arrives in another. No amount of engineering on the Indian side changes that. What India can change is its access to upstream data, which at present moves when relations are warm and stops when they are not. The marker to watch is whether the Medog construction timetable comes with a year round data sharing commitment, because that data is the only warning the Northeast would get.

    Disaster Risk Reduction in India

    1. What it covers: Disaster risk reduction cuts exposure and vulnerability through prevention, mitigation and preparedness, rather than through relief paid after an event.
    2. Who runs it: The Ministry of Home Affairs coordinates disaster management through its Disaster Management Division. Response is primarily a State government responsibility.
    3. The four fund pillars: The National Disaster Response Fund (NDRF) and State Disaster Response Fund (SDRF) finance relief. The National and State Disaster Mitigation Funds (NDMF and SDMF) finance risk reduction projects alone.
    4. Scale of the commitment: The Fifteenth Finance Commission allocated Rs 2.28 lakh crore for 2021 to 2026 across preparedness, mitigation, response and reconstruction.

    Laws and Rules Governing Disaster Risk Reduction

    1. Disaster Management Act, 2005: Establishes structures and processes at the national, State, district and local levels.
    2. Authorities created: The NDMA chaired by the Prime Minister, State Disaster Management Authorities chaired by the Chief Minister, and District Disaster Management Authorities headed by the District Collector.
    3. Disaster Management (Amendment) Act, 2025: Modernises the 2005 framework for urban risk, climate extremes and data driven response.
    4. Urban Disaster Management Authorities: States may set up city specific authorities in State capitals and municipal corporation cities.
    5. Statutory databases: National and State disaster databases covering risk assessments, mitigation plans and real time data are now mandated.
    6. Plan ownership shifts: The NDMA and State authorities now prepare the disaster plans, earlier a task of the National and State Executive Committees.

    Government Initiatives for Disaster Risk Reduction

    1. National GLOF Risk Mitigation Project: A Rs 150 crore project covering Arunachal Pradesh, Himachal Pradesh, Sikkim and Uttarakhand.
    2. Central Water Commission lake monitoring: The Commission monitors 902 glacial lakes and has a Risk Indexing Framework to prioritise high risk ones.
    3. Common Alerting Protocol based Integrated Alert System: A Rs 354.83 crore project delivering geo-targeted warnings through SMS, television, radio, sirens and satellites.
    4. Mission Mausam (2024 to 2026): Strengthens weather forecasting and multi-hazard early warning, including for outburst related risks.

    Key Facts about Disaster Risk Reduction

    1. Sendai Framework for Disaster Risk Reduction (2015 to 2030): The global blueprint adopted at Sendai in Japan, carrying four priorities and seven global targets.
    2. The United Nations custodian: The United Nations Office for Disaster Risk Reduction anchors the agenda and runs the Sendai Framework Monitor.

    Challenges in Disaster Risk Reduction

    1. Mitigation stays funded far below response: The roughly 80:20 tilt in the fund architecture privileges relief spending over prevention. Eg. Under the mitigation fund in 2025-26 the High Level Committee approved Rs 507.37 crore for panchayat led community risk reduction, a fraction of what response draws. Fix. Set a floor share of the disaster corpus spendable only on early warning, retrofitting and nature based solutions.
    2. India’s deadliest hazards are not notified disasters: Heatwaves and lightning sit outside the notified list, so States cannot draw relief for deaths from them. Eg. The Centre has not accepted the Sixteenth Finance Commission recommendation to notify them. Fix. Notify both with an IMD linked declaration trigger and a stated compensation protocol.
    3. The urban authority created in 2025 barely exists: City specific authorities are a State mandate, and only one State has set one up. Eg. Karnataka constituted an urban authority for the Bruhat Bengaluru Mahanagara Palike. Fix. Fund the rollout centrally and fix a clear interface with the municipal corporation.
    4. The local tier remains under-empowered: Panchayats and urban local bodies are the first responders yet hold neither trained staff nor untied funds. Eg. The Aapda Mitra volunteer scheme trains community responders but reaches a small share of vulnerable districts. Fix. Route a fixed share of the mitigation fund to the local body with a training and equipment condition.

    Matching Previous Year Question

    “[2024, GS3, 15 marks] What is disaster resilience? How is it determined? Describe various elements of a resilience framework. Also mention the global targets of the Sendai Framework for Disaster Risk Reduction (2015-2030).”

  • Behind Nepal floods, rising risk of glacier collapse (Explainer)

    Behind Nepal floods, rising risk of glacier collapse (Explainer)

    Why in the News

    Flash floods that swept through parts of Nepal and Tibet this week followed a glacial collapse in the Himalayas. The collapse sent a mass of ice and rock debris into the Lhende Khola and Bhote Koshi river system, and this debris reached inhabited valleys downstream. Glaciologists say such collapses are becoming more frequent because of faster warming in the Himalayas, and disaster planning for hydropower siting and early warning has not kept pace with this rising risk.

    What is a glacial collapse?

    1. Sudden mass failure of a glacier: A glacial collapse is the sudden detachment of a large mass of ice, rock and water from a glacier resting on a steep mountain slope.
    2. Triggered by geological and physical factors: Earthquakes, temperature changes and other physical changes unfolding within a glacier can trigger a collapse.

    How does a glacier’s own structure fail under stress?

    1. Formation builds a heavy, moving mass: Snow that survives several melting seasons compresses into firn (a granular midpoint stage between fresh snow and glacial ice) before recrystallising into the solid ice of a glacier.
    2. Gradient driven flow creates fracturing stress: Once a glacial mass is heavy enough it flows outward along the mountain gradient. This acceleration creates stress that exceeds the strength of the ice, and sustained movement eventually fractures it.
    3. Surface melting weakens the ice from within: Meltwater pools inside surface cracks over repeated freeze and thaw cycles. This repeated pressure eventually splits the ice all the way through.

    Why do wet base glaciers in the Himalayas pose a distinct collapse risk?

    1. Soft beds trap and channel meltwater: Where a glacier rests on soft mud or clay, trapped water moves through networks of cracks within the ice and travels toward the base.
    2. Subglacial tunnels concentrate large volumes of water: In wet base Himalayan glaciers, water collects at the base in large quantities and is occasionally connected by tunnels, so a collapse can release a concentrated volume of water at once.

    Why can a single glacial collapse trigger a second wave of flooding?

    1. Debris blocks the river before it breaks free: Collapsed ice and rock piles can block narrow river channels and form temporary natural dams downstream.
    2. A dam break repeats the flood: When such a temporary dam breaks under continuous pressure, it unleashes a second round of flooding, as happened in Nepal this week.

    Challenges to managing glacial collapse risk

    1. Rising baseline risk from faster warming: The incidence of glacier breakages in the Himalayas has increased because the region is warming faster than the global average. Eg. This week’s Nepal and Tibet collapse and debris flow into the Lhende Khola and Bhote Koshi system is one instance of this rising baseline risk. Fix. Expand year round remote seismic monitoring and high altitude early warning systems across the central Himalayan glacier belt, not only at individual high risk sites.
    2. Search and rescue capacity has not kept pace: More frequent and physically more demanding glacial collapse events place a growing burden on search and rescue missions in remote high altitude terrain. Eg. Reaching debris blocked valleys along the Bhote Koshi system after this week’s floods required search teams to operate in terrain cut off by the same collapse. Fix. Pre position high altitude search and rescue teams and equipment at seasonal staging points along known glacial risk corridors before the summer melt season.
    3. Critical infrastructure remains sited in high risk zones: Hydropower plants and other critical infrastructure continue to be built in areas exposed to glacial collapse and the flooding it can trigger. Eg. Downstream hydropower installations on Himalayan rivers were damaged in the 2021 Rishiganga Dhauliganga disaster in Uttarakhand, when an upstream ice and rock avalanche triggered a sudden flash flood. Fix. Make hazard zonation for glacial collapse and outburst flood risk a mandatory clearance requirement before critical infrastructure is sited in glacier fed river valleys.
    4. Upstream glacial instability is not systematically shared across borders: Himalayan river systems cross national boundaries, but instability observed on a glacier upstream is not routinely communicated to downstream countries before a disaster strikes. Eg. This week’s collapse originated in Tibet and Nepal before its effects reached downstream valleys, showing how upstream instability in one country can affect communities in another with little warning. Fix. Establish a standing India, Nepal and China data sharing mechanism for real time glacial and river monitoring in shared Himalayan basins.

    Conclusion

    Himalayan glacial collapses are becoming more frequent as regional warming outpaces the historical baseline, and this week’s Nepal and Tibet floods are a fresh instance of that pattern. The next step for disaster managers is to convert scattered seismic monitoring and hazard mapping efforts into a standing, cross border early warning system, before the next collapse rather than after it.

  • [28th August 2026] The Hindu OpED: New-age fires

    [28th August 2026] The Hindu OpED: New-age fires

    Question (2024, GS3): “What is disaster resilience? How is it determined? Describe various elements of a resilience framework. Also mention the global targets of the Sendai Framework for Disaster Risk Reduction (2015-2030).”
    Linkage: The lack of a “distinct safety regime” for highly vulnerable environments like ICUs represents a core gap in India’s disaster resilience framework. This question challenges candidates to describe how to move from a structural vulnerability to a resilient system using global standards like the Sendai Framework.

    Mentor Comment

    India’s fire risk profile has shifted over the past 15 years from industrial facilities, large offices and mass gatherings toward residential buildings, hotels and hospitals, with electrical fires, driven by heavier appliance use, overloaded circuits and poor maintenance, now predominant. Intensive Care Units are especially vulnerable because of their oxygen rich environments, and this month back to back fires struck neonatal Intensive Care Units in Amravati, Maharashtra, and Chhindwara, Madhya Pradesh. Despite a string of near identical incidents since the 2024 Jhansi fire in which 18 newborns died, ICU fires have still not produced a single, distinct safety regime for the units most at risk.

    What happened in this month’s neonatal ICU fires?

    1. Amravati: The fire was extinguished within 30 minutes, but smoke proved fatal for three babies who were already being treated for complications, with a faulty ventilator suspected as the cause.
    2. Chhindwara: A short circuit in a warmer at the district hospital’s Neonatal Intensive Care Unit triggered a fire in which three newborns, only days old, suffered burns.

    Why should ICU fires be treated as a distinct safety category?

    1. They are sealed spaces that fill with smoke fast: Intensive Care Units are sealed compartments where smoke accumulates quickly, and in a Neonatal Intensive Care Unit patients cannot evacuate on their own, making regular evacuation drills essential.
    2. A safer design already exists on paper: A best case setup includes three independent exits, with at least two allowing horizontal evacuation, automatic sprinklers, independent power lines for major equipment, oxygen cylinder supports positioned away from electrical sockets, and fire drills held every two years.

    What regulatory response has followed past ICU fires?

    1. A professional body called for mandatory certification: Following an earlier Neonatal Intensive Care Unit fire in Delhi, the National Neonatology Forum called for mandatory fire safety certification for Neonatal Intensive Care Unit equipped hospitals, regular power audits and analogue addressable alarms.
    2. A named evacuation protocol followed: The same push produced a standard evacuation protocol, now known as RACE, for Rescue, Alarm, Confine, and Extinguish or Evacuate.
    3. New national guidelines offer a starting point: The 2026 National Guidelines on Fire and Life Safety in Healthcare Facilities can serve as a starting point for building ICU and Neonatal Intensive Care Unit specific safety standards.

    What risk do post fire investigations typically miss?

    1. Electrical harmonics is a largely unaudited factor: Neonatal Intensive Care Unit equipment is packed with electronic components that draw distorted current, which can silently overheat neutral wiring, transformers and loose connections without ever tripping a circuit breaker.
    2. Generic findings may be hiding the real cause: Post fire reports that cite generic “short circuits” or “technical faults” may be missing this harmonic driven degradation entirely, leaving the underlying risk unaddressed even after an inquiry closes the case.

    Challenges to ICU fire safety

    1. Fire safety certification is not uniformly enforced: Many hospitals, particularly outside metro cities, operate without a valid fire safety no objection certificate or lapse on renewal. Eg. Investigations after major hospital fires, including the Jhansi Neonatal Intensive Care Unit fire in which 18 newborns died, have repeatedly found expired or absent fire clearances. Fix. Link a hospital’s fire safety certificate renewal to its registration and accreditation status, so a lapsed certificate automatically suspends the facility’s licence to operate.
    2. Backup power for critical equipment is often shared, not independent: Ventilators, warmers and monitors frequently run off the same power lines as general hospital load, so a single fault can cut life support equipment. Eg. A suspected equipment fault caused this month’s Amravati Neonatal Intensive Care Unit fire. Fix. Mandate a dedicated, separately fused power line for every ICU bed’s life support equipment, independent of the hospital’s general electrical circuit.
    3. Frontline staff are rarely trained for ICU specific evacuation: Evacuating patients who cannot move on their own requires drilled procedures that most hospital staff never practise. Eg. Regular ICU evacuation drills remain the exception rather than the norm even at accredited hospitals nationally. Fix. Make a biennial ICU evacuation drill, as already recommended for Neonatal Intensive Care Units, a mandatory condition of hospital accreditation across all critical care units, not only newborn wards.

    Conclusion

    ICU and Neonatal Intensive Care Unit fires have recurred at roughly the same scale and for the same reasons since the 2024 Jhansi fire, with certification calls and evacuation protocols repeatedly following each incident without preventing the next one. Treating ICU fires as a distinct safety category, backed by independent power lines, harmonics audits and enforced certification, is what remains to convert a decade of incident specific responses into a standing safety regime.

  • Echoes of past, warning for future

    Echoes of past, warning for future

    Why in the News

    A flash flood in Nepal’s Bhotekoshi Trishuli river system has killed more than 350 people, left several hundred more missing, and damaged 35 motorable bridges, 45 suspension bridges and about 40 kilometres of roads across the affected corridor, Nepalese authorities said. Satellite imagery analysed by global agencies, including the Indian Space Research Organisation, points to a glacier collapse or rock and ice avalanche in Tibet that briefly blocked the river before a sudden, destructive release downstream. An earthquake was initially suspected as the trigger, but subsequent analysis has not supported that theory. The exact sequence, whether an ice block broke away from the glacier or a lake within the glacier breached, remains contested, and the disaster is the latest in a run of Himalayan cascade events that repeated monitoring gaps have failed to prevent.

    What is a Glacial Lake Outburst Flood?

    1. About: A Glacial Lake Outburst Flood is the sudden, large scale release of water when a lake formed by a melting glacier breaches, either because a block of glacial ice or rock falls into it or because accumulated stress in its containing moraine gives way.
    2. Mechanism: The resulting wave can overtop and breach the lake’s frontal moraine, releasing water, rock and debris that erode river banks, uproot trees and trigger further landslides as it moves downstream.
    3. A related event type: A cascade can also begin without a lake, when a large block of glacial ice or rock breaks away and falls directly into a river, as is currently suspected in the Nepal disaster.

    What is understood so far about what caused the Nepal disaster?

    1. A rock and ice avalanche is the leading explanation: The event is currently understood to have been triggered by a large block of glacier breaking off in the upper reaches of the Bhotekoshi river, known as the Trishuli in its lower course, though what caused the break is not yet clear.
    2. Heavy rainfall has been ruled out: No heavy rainfall was recorded in the area, which rules out an extratropical Western Disturbance as the trigger despite north India and the Himalayan region being under its influence at the time.
    3. The earthquake reading was reclassified: The United States Geological Survey first reported a 4.4 magnitude earthquake, then revised its assessment to say the seismic signal, later corrected to 5.2 magnitude, was generated by a glacial collapse and debris flow rather than an actual earthquake.
    4. Scientists are divided on the exact mechanism: One glaciologist has pointed out that no ice blocks are visible in videos of the disaster and suggested a breach in a “supra glacial lake” (a lake that forms within a glacier rather than at its foot, increasingly common as glaciers melt under climate change) as the more likely cause, a view a former national disaster management official has echoed.

    How does the Nepal disaster compare with past Himalayan cascade disasters?

    1. Kedarnath, 2013: Unusually heavy rainfall melted the Chorabari glacier and swelled the Mandakini river, causing flash floods and landslides across Uttarakhand, Himachal Pradesh and western Nepal that left nearly 6,000 people presumed dead, the most devastating of the four.
    2. Chamoli, 2021: A rock and ice avalanche broke away from a glacier, an estimated 27 million cubic metres of material, and fell into the Rishiganga river in Uttarakhand, killing more than 200 people.
    3. Sikkim, 2023: The collapse of nearly 14.7 million cubic metres of frozen moraine into the South Lhonak glacial lake generated a 20 metre high wave that breached the lake’s frontal moraine, releasing about 50 million cubic metres of water, eroding roughly 270 million cubic metres of sediment and triggering 45 secondary landslides that killed at least 55 people.
    4. Dharali, 2025: Days of continuous rain combined with terrain at nearly 6,900 metres above sea level triggered mudslides, debris slides and flash floods in Uttarakhand that killed at least 69 people.

    Why does the Himalayan region keep producing these cascading disasters?

    1. The ecosystem is already destabilised: A glaciologist heading a Himalayan research organisation’s Cryosphere group has described the entire Himalayan region as “out of balance” because of population pressure and climate change, with newer areas being exposed as glaciers retreat.
    2. A single trigger becomes a multi hazard chain: What begins as one event, extreme rainfall, a landslide or a lake overflow, quickly compounds into a chain reaction of bank erosion, added debris and further landslides, because the surging water in a narrow mountain valley has no way to disperse until the terrain flattens.
    3. The region is also earthquake prone: The Himalaya is among the most seismically dangerous regions in the world, and Nepal itself suffered a 7.2 magnitude earthquake in 2015, so rainfall, a landslide or seismic activity can each independently trigger a similar cascade.

    What early warning cooperation exists across the Himalayan region?

    1. Two regional mechanisms already exist: The World Meteorological Organisation’s South Asia Hydromet Forum brings together the region’s meteorological and hydrological agencies, while the South Asia Flash Flood Guidance System provides regional flood forecasting and guidance.
    2. These systems remain under scaled for the risk: Both need to be scaled up to allow greater sharing of data, forecasting expertise and early warning systems among Himalayan countries, since the current disaster crossed from Tibet into Nepal without any shared alert reaching people downstream in time.
    3. India and China share common ground despite other differences: The two countries are often aligned in climate negotiations despite their broader geopolitical disagreements, a common outlook that has not yet been converted into a shared India China Nepal early warning system for glacial and flood risk.

    Challenges to Himalayan glacier and flood monitoring

    1. The scale of what needs monitoring is enormous: The Indian Himalaya alone holds nearly 7,500 glacial lakes and about 15,000 glaciers, only some of which are tracked through remote sensing. Eg. Ground verification requires site visits that are feasible only between July and September because of terrain and weather. Fix. The National Disaster Management Authority’s National GLOF Risk Mitigation Programme, launched after the Sikkim disaster with an outlay of Rs 150 crore, is installing early warning systems at high risk glacial lakes across Sikkim, Uttarakhand, Arunachal Pradesh, Himachal Pradesh, Jammu and Kashmir and Ladakh, though it currently covers only 195 lakes against thousands identified.
    2. Early warning carries its own risk of being ignored or causing panic: Forecasting a glacier collapse accurately remains extremely difficult, and a warning that proves false can be counterproductive if residents who lack alternatives choose not to move regardless. Eg. Communities living near glacial lakes have historically stayed in place through repeated flood warnings because they have nowhere else to go. Fix. Pair early warning systems with pre identified relocation sites and compensation, so a warning carries a real alternative rather than only an instruction to move.
    3. Construction in vulnerable zones continues unchecked: Dams and hydropower projects sited in glacial and flood prone terrain are consistently among the first structures destroyed in these events. Eg. A hydropower project in Sikkim was pulverised by the 2023 South Lhonak glacial lake outburst flood. Fix. Enforce construction codes that bar large dams and settlements from mapped high risk zones and require glacier health assessments before project clearance.

    Conclusion

    The exact cause of the Nepal flood is still being verified, but it fits an established pattern of Himalayan cascade disasters that recur every few years across India and Nepal. What remains unresolved is less the mechanism of any single event than the region’s continuing gaps in glacier monitoring, construction regulation in vulnerable terrain and cross border early warning, none of which past disasters have closed.

    PYQ

    [2014] “Bring out the relationship between the shrinking Himalayan glaciers and the symptoms of climate change in the Indian sub-continent.”

  • How can States use disaster funds for heatwaves?

    How can States use disaster funds for heatwaves?

    Why in the News

    The Ministry of Home Affairs told the Lok Sabha on 4 August 2026 that heatwaves and lightning have been added to India’s list of notified natural calamities, taking the list to 14 items. The change follows a recommendation of the Sixteenth Finance Commission (FC-XVI), the constitutional body under Article 280 that recommends the distribution of resources including disaster funds between the Centre and the states, and operational guidelines issued on 30 June 2026. Heatwaves are now eligible for the full State Disaster Risk Management Fund pool rather than the capped local-disaster route states previously had to use.

    What changes for states?

    1. Removal of the funding ceiling: A state could previously notify a heatwave only as a “local disaster” and draw on the State Disaster Response Fund (SDRF) up to a 10% annual cap, after setting its own compensation norms. Other notified disasters such as floods and cyclones faced no such ceiling. The new notification removes this asymmetry.
    2. Two distinct funding routes now available: Under the SDRF, states can fund relief and compensation for heat-related losses. Under the State Disaster Mitigation Fund (SDMF), a fund meant for longer-term risk reduction rather than immediate response, states can finance cooling shelters and early-warning systems.
    3. Scale of the fund pool: FC-XVI recommended Rs 2.04 lakh crore for state disaster funds over 2026-27 to 2030-31, about 28% more than the previous Commission’s allocation, split Rs 1.6 lakh crore to the SDRF and the rest to the SDMF. It separately recommended Rs 79,406 crore for national disaster funds that states can draw on when a disaster exceeds their own resources.

    What challenges are in the way of using the funds effectively?

    1. Uneven heat action planning: Twelve states have notified heatwaves locally, but only around 300 cities and districts across 23 heatwave-prone states have Heat Action Plans (HAPs), leaving roughly 4,800 urban local bodies and 800 districts without one. Fix. Heat-specific SDMF guidelines, still awaited, will need to be paired with the risk and vulnerability assessments already required before any project proposal.
    2. Limited technical capacity to convert plans into proposals: A 2023 review found 79% of existing HAPs asked city departments to self-fund interventions rather than costing a proposal against the new fund. Fix. States need model mitigation proposals suited to local climate and geography, since many local bodies lack the capacity to prepare fundable projects on their own.
    3. Weak loss-and-damage data: Relief payouts under the new notification will depend on accurate heat mortality and morbidity data. The Health Ministry’s surveillance system, covering over 51,000 reporting units, recorded 4,853 heatstroke cases and 20 confirmed heatstroke deaths between 1 March and 26 July, but it does not capture the wider toll from heart, lung and kidney conditions worsened by heat.

    Conclusion

    The notification closes a genuine funding gap between heat and other disasters, but the benefit depends on state capacity to plan, cost and document heat interventions. Parametric insurance, which pays out automatically once a set temperature threshold is crossed, similar to Nagaland’s existing rainfall insurance, is one fast-disbursing tool states can pair with the new fund access.

    Back2Basics: State Disaster Risk Management Fund

    1. It is the combined pool of the State Disaster Response Fund (SDRF), for immediate relief and reconstruction after a disaster, and the State Disaster Mitigation Fund (SDMF), for interventions that reduce the risk of a hazard becoming a disaster.
    2. The Finance Commission fixes the inter-state distribution using a disaster risk index built from hazard frequency and intensity, exposure, vulnerability, and a state’s expenditure record in the previous Commission’s period.

    “[2024, GS3, 15 marks] What is disaster resilience? How is it determined? Describe various elements of a resilience framework. Also mention the global targets of the Sendai Framework for Disaster Risk Reduction (2015-2030).”

  • Odisha’s Coastline Is Shrinking: 28% Under Erosion Threat

    Why in the News

    A reply tabled in the Rajya Sabha by the Union Minister for Ports, Shipping and Waterways stated that about 28.3 percent of Odisha’s 564 km coastline is undergoing erosion. The figure sits alongside a second one that complicates it, since 54.1 percent of the same coastline is gaining land, which means the state faces not a uniformly retreating coast but a redistribution of sand that destroys some villages while building others.

    What is a geotextile tube embankment?

    1. About: A geotextile tube is a large cylindrical container fabricated from high strength, porous synthetic fabric and filled with a sand slurry to form an artificial coastal structure.
    2. Material: The fabric is a woven synthetic such as polypropylene, which retains the sand fill while allowing water to drain out through the pores.
    3. Function: Rows of such tubes are laid to form a sea wall that absorbs the impact of incoming waves at the shoreline. The energy loss at the structure reduces the scouring of the beach behind it.
    4. Deployment in Odisha: One such embankment is being developed at Pentha village in Kendrapara district, one of the worst affected stretches of the Odisha coast.
    5. Why it is preferred: The tubes are filled with locally dredged sand rather than imported rock armour, which lowers cost and allows the structure to settle with the seabed.

    What is shoreline change?

    1. About: Shoreline change is the dynamic process in which the boundary between land and water shifts over time.
    2. Drivers: The shift is produced by natural forces such as waves, tides and storms, and by human activity such as port construction and sand mining.

    What is coastal accretion?

    1. About: Accretion is the seaward growth of the shoreline when sediment carried by waves and currents is deposited faster than it is removed.
    2. Why it matters: A coastline can record accretion in aggregate while individual stretches erode, because the same longshore current that starves one beach feeds another.

    What is the National Centre for Coastal Research?

    1. About: The National Centre for Coastal Research (NCCR) is the national institution that monitors long term shoreline change across the Indian coastline.
    2. The Odisha study: It carried out a comprehensive assessment and mapping of shoreline change analysis along the Odisha coast from 1990 to 2022, and identified several stretches in the affected districts as vulnerable stretches.

    How does erosion vary across Odisha’s six coastal districts?

    1. The state level split: Of the 564 km coastline, 28.3 percent is eroding, 17.6 percent is stable with no significant shoreline change, and 54.1 percent is undergoing accretion.
    2. Jagatsinghpur: The most erosion prone district, with 47.6 percent of its 55.8 km coastline facing erosion.
    3. Ganjam: Erosion affects 45.7 percent of its 60.18 km shoreline.
    4. Kendrapara: Erosion affects 45 percent of its 149.36 km shoreline, the longest coastline among the six districts.
    5. Balasore: Erosion affects 23.8 percent of its 88 km coastline.
    6. Puri: Erosion affects 10.2 percent of its 138 km coastline.
    7. Bhadrak: Erosion affects 4.6 percent of its 72 km coastline, the lowest share among the six.

    What drives shoreline change along the Odisha coast?

    1. Natural marine forces: Waves, tides and storms continuously redistribute sediment along the coast.
    2. Coastal structures: A 2021 study on shoreline change along the Odisha coast, published in the Journal of Earth System Science, records that sea walls, breakwaters and jetties modify both the shoreline and the beach morphology.
    3. Ports and harbours: The effect is more significant where hard structures are raised for port and harbour development, which interrupts the longshore movement of sand.
    4. Extreme events: Tsunamis and cyclonic storms produce drastic shoreline changes, and Odisha is the most cyclone prone state along the Indian coast.
    5. Human extraction and construction: Sand mining and unplanned infrastructure development along the coast remove or block sediment supply.
    6. Sea level rise: Global sea level rise driven by climate change adds a permanent upward baseline to every storm surge and tidal cycle.

    What has coastal erosion already cost Odisha’s communities?

    1. Villages lost in Kendrapara: Rising sea level and coastal erosion have already submerged 16 villages in Kendrapara district, displacing several hundred people.
    2. Loss beyond land: The affected villagers lost not only their land but also their livelihoods, since fishing and cultivation both depend on proximity to the lost shoreline.
    3. Podampeta in Ganjam: A village of nearly 500 households has been deserted as the sea swept inland.
    4. Ramayapatna and other settlements: Several other coastal villages in Ganjam are witnessing the sea advance towards the landmass, rendering residents homeless.

    What measures has Odisha taken to protect its coast?

    1. Geotextile tube embankment: A geotextile tube sea wall is being developed at Pentha in Kendrapara to absorb wave impact on one of the most exposed stretches.
    2. Sea wall cum service roads: These are being developed across parts of Balasore district and at Ramayapatna beach in Ganjam.
    3. How the dual structure works: The outer tier acts as a defensive barrier against strong tidal waves and erosion. The inner tier operates as a service road for local transport and public access.
    4. Planned relocation: The state has developed a resettlement colony, described as India’s first climate resettlement colony, to accommodate people displaced by coastal erosion.
    5. Vulnerability mapping: The NCCR has identified specific vulnerable stretches within the six districts on the basis of long term shoreline analysis, which allows protection works to be prioritised.

    “[2022, GS3, 15 marks] Explain the causes and effects of coastal erosion in India. What are the available coastal management techniques for combating the hazard?”