Food security refers to a situation where all people at all times have physical, social and economic access to sufficient, safe and nutritious food (FAO).
According to the 2025 Global Report on Food Crises (GRFC), over 295 million people faced acute hunger last year, with climate extremes being a primary driver.
Consequences of climate change on food security in tropical countries
Decline in Crop Yields – Eg- rice and wheat yields in South Asia may decline by 10-20% by 2050 due to warming.
Increased Frequency of Droughts affects rain-fed agriculture. Eg- Horn of Africa droughts have caused repeated crop failures and food shortages.
Extreme Weather Events – Damage to crops and agricultural infrastructure. Eg- flood damage to paddy fields in Bangladesh.
Heat Stress on Crops reduce photosynthesis and crop growth. Eg- Maize yields in tropical Africa and Latin America are projected to decline by up to 24% by 2030 if current warming trends persist.
Decline in Fisheries – Eg- Tropical reef-based fisheries in Indonesia and the Philippines have seen a 20% decline in catch potential since 2020 due to coral bleaching.
Spread of Crop Pests and Diseases – Warmer climates favour pest outbreaks. Eg- 2025-26 Locust swarms in the Horn of Africa and South Asia have devastated over 200,000 hectares of farmland.
Loss of Arable Land due to sea-level rise and salinisation. Eg- saltwater intrusion in Vietnam’s Mekong Delta impacting rice paddies.
Reduced Nutritional Quality of Crops – Elevated CO₂ may reduce nutrient content in staples. Eg- declining protein and micronutrient levels in rice and wheat.
Livestock Productivity Decline – Heat stress affects animal health and milk production.
Food Price Volatility and Poverty – Climate shocks disrupt supply chains and raise food prices.
Heatwaves are disrupting the synchronization between flowering plants and their pollinators. Eg- decline in native bee populations in Brazil impacting the yields of high-value tropical fruits and nuts.
Soil Degradation and Erosion-Intense tropical storms strip away the nutrient-rich topsoil (humus), leading to long-term infertility.
Way Forward
Climate-Smart Agriculture (CSA)- Promoting integrated systems that increase productivity and resilience while reducing emissions.
Diversification of Cropping Systems – Promoting millets, pulses and climate-resilient crops.
Development of Heat-Tolerant Varieties- Investing in “Scuba Rice” (flood-tolerant) and drought-resistant C4 crops like millets and sorghum.
Managed Aquifer Recharge (MAR)- Implementing “Sponge Farm” techniques to capture monsoon runoff and recharge groundwater for dry spells.
Agroforestry and Intercropping- Planting nitrogen-fixing trees alongside crops to provide shade, improve soil moisture, and diversify income.
Strengthening Cold Chains- Investing in solar-powered refrigerated storage and hermetic bags to reduce post-harvest spoilage.
Promoting Crop Insurance- Scaling up “Weather-Index Based Insurance” to protect farmers against total financial collapse after a climate disaster.
Circular Food Systems- Reducing food waste and converting agricultural by-products into biogas or organic fertilizers.
International Climate Finance- Ensuring that the Loss and Damage Fund (operationalized at COP28/29) is accessible to tropical nations for rebuilding food systems.
Tropical countries are the “frontline states” in the war against climate-induced hunger. A global commitment to limit warming to 1.5^ C and a radical shift from “exploitative” to “regenerative” food systems is needed.