The Food and Agriculture Organization (FAO) and the World Meteorological Organization (WMO) have released a joint report on “Extreme Heat and Agriculture,” identifying extreme heat as a systemic risk to global food security. The analysis focuses on impacts up to the “farm gate,” showing how human-induced climate change is increasing the frequency of compound events, simultaneous heatwaves and droughts that amplify agricultural stress.
These combined shocks can push yield losses beyond 30%, accelerate crop maturation, and cause irreversible reproductive damage in staples such as rice and wheat. The report also quantifies a structural relationship between temperature and productivity, noting that maize yields decline by 7.5% per 1°C increase in warming.
The impact extends across all subsectors. Livestock systems face declining productivity and reproductive efficiency beyond thermal thresholds, with global cattle losses projected at USD 40 billion annually by 2100. Fisheries are being disrupted by marine heatwaves, causing mass mortality and shifts in aquatic ecosystems, while forestry systems face rising wildfire risks and pest vulnerability.
The report also identifies a major human constraint. Heat stress is projected to reduce agricultural labour capacity by up to 33%, directly affecting productivity in labour-intensive rural economies. In response, FAO and WMO call for “Integrated Risk Governance,” urging governments to coordinate policies across agriculture, water, labour, and health systems rather than treating risks in isolation.
Focus on India: Heat Risks and Rural Livelihoods
Cascading Failures: India is identified as a primary region experiencing compound heat-drought events, leading to systemic failures in the agrifood system, affecting both crop yields and the health of the national livestock herd.
Livelihood Disruptions: The report documents documented instances of crop failures and livestock losses in India leading to increased rural-to-urban migration and localized food insecurity.
Vulnerable Groups: Small-scale producers and marginalized communities in India are flagged as the most "at-risk" groups, having the least financial buffer to survive successive heat-induced crop failures.
Water Scarcity: Extreme heat has significantly depleted water resources for irrigation in India, creating a "competition for water" between agricultural needs and domestic consumption.
Policy Needs: The report emphasises that for India, social protection measures and improved access to real-time climate information are non-negotiable for safeguarding the rural economy.
Key Findings and Global Metrics
Crop Vulnerability: Maize yields drop by 7.5% per 1°C of warming; compound hot-dry events can trigger losses over 30%.
Labor Crisis: Worker productivity is severely compromised, with a projected one-third reduction in labor capacity in regions like Africa under 3°C warming.
Livestock Economics: High-emission scenarios threaten USD 40 billion in annual cattle industry losses by the end of the century.
Fisheries & Forestry: Marine heatwaves are forcing mass stock migrations; extreme heat increases wildfire risks and weakens tree immunity against pests.
Adaptation Limits: The report distinguishes between "soft" limits (lack of resources) and "hard" limits (physiological thresholds where crops or animals simply cannot survive).
Technical Solutions: Scaling up heat-tolerant crop varieties, agro-meteorological advisories, and improved irrigation systems.
What are "Compound Events" in Agriculture?
A compound event occurs when two or more weather hazards, such as a heatwave and a drought, happen at the same time or in quick succession. In agriculture, the combination is much more destructive than the sum of its parts.
For example, extreme heat increases the rate at which plants lose water, while a drought means there is no water in the soil to replace it. This "double blow" leads to rapid wilting and crop failure. The FAO–WMO report emphasizes that these compound events are becoming the new normal, requiring farmers to plan for multiple disasters simultaneously rather than one at a time.
Policy Relevance
Refining the PM Fasal Bima Yojana: The report’s data on 30% losses from compound events provides a statistical basis for insurers to adjust risk premiums and payout structures for "heat-drought" dual triggers.
Informing the National Mission on Sustainable Agriculture (NMSA): The focus on heat-tolerant varietiessupports India’s push for climate-resilient seeds (like heat-resistant wheat varieties) developed by ICAR.
Guiding Ground Water Management: With heat depleting surface water, the report reinforces the urgency of the Atal Bhujal Yojana to protect underground aquifers as a "last-resort" cooling resource for crops.
Labor Protections: Findings on reduced labor capacity inform the need for mandatory "rest-and-hydration" protocols for MGNREGA workers during peak summer months.
Targeting Nutritional Security: Since staples like rice and pulses are heat-sensitive, the policy helps the National Food Security Mission prioritise crops that maintain nutritional value under thermal stress.
Follow The Full News Here: FAO–WMO: Extreme Heat and Agriculture Report 2026