30/04/2026
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Extreme heat is pushing global agrifood systems to the brink, threatening the livelihoods and health of more than a billion people, according to a new report by the United Nations Food and Agriculture Organization (FAO) and the World Meteorological Organization (WMO). The agencies warn that rising temperatures are shrinking the narrow βsafety marginβ that plants, animals and humans rely on to function, with crop yields for major staples like wheat, rice and maize beginning to fall once temperatures exceed about 30 degrees Celsius.
Recent climate data show that 2025 ranked among the three hottest years on record, fuelling more frequent, intense and prolonged heatwaves that act as a βrisk multiplierβ for droughts, wildfires and pest outbreaks. In key breadbasket regions, heat stress is already damaging crops, livestock, fisheries and forests, reducing farm incomes and raising the risk of foodβprice spikes. The report also notes that extreme heat is costing hundreds of billions of lost work hours annually, striking hardest at smallholder farmers and informal workers in South Asia, SubβSaharan Africa and Latin America.
UN officials stress that faster emissions cuts, expanded irrigation resilience, heatβtolerant crop varieties and better weatherβbased earlyβwarning systems are urgently needed to protect food security.
Without deeper adaptation and mitigation, the same regions that depend most on agriculture will face recurring harvest failures, higher malnutrition and deeper rural poverty over the next decade.