Extreme Heat Threatens Global Food Systems: A UN Report Overview

A recent report by the United Nations Food and Agriculture Organization (FAO) and the World Meteorological Organization (WMO) highlights the severe risks posed by extreme heat to global food systems, threatening the livelihoods of over a billion people. The report indicates that rising temperatures are pushing agricultural systems to the brink, with increasing frequency and intensity of heatwaves adversely affecting crops, livestock, and fisheries.

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The report reveals that extreme heat is a significant risk multiplier, exacerbating existing vulnerabilities within agricultural systems. For instance, temperatures exceeding 30°C can lead to reduced yields in major crops such as maize and wheat, with projections indicating a decline of up to 10% for every additional degree of warming. Livestock, particularly chickens and pigs, begin to suffer from heat stress at temperatures above 25°C, leading to health complications and decreased productivity. In some regions, farmers may face up to 250 days a year where working conditions are unsafe due to extreme heat.

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The implications of extreme heat extend beyond immediate agricultural impacts. Kaveh Zahedi, head of FAO's climate change office, emphasized that extreme heat is "rewriting the script" on agricultural practices, affecting when and how food can be produced. This disruption threatens food security and could lead to increased prices and economic instability, particularly in vulnerable regions such as South Asia and sub-Saharan Africa.

Extreme Heat Puts Food Systems at Risk – UN

Critics, including Morgan Ody, general coordinator of La Via Campesina, argue that the current industrial agricultural practices contribute significantly to greenhouse gas emissions, exacerbating climate change. Ody advocates for compensation for affected workers, debt relief, and public investment in adaptive measures. Experts like Molly Anderson stress the need for a diversified food system that can withstand climate shocks, urging a shift away from intensive farming practices.

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FAO Director-General Qu Dongyu stated, "This work highlights how extreme heat is a major risk multiplier," while WMO Secretary-General Celeste Saulo noted that extreme heat is increasingly defining the conditions under which agrifood systems operate. Both leaders called for urgent adaptation measures, including early warning systems and climate-resilient agricultural practices.

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The report outlines several recommendations for mitigating the impacts of extreme heat on agriculture. These include implementing adaptive measures such as selective breeding, adjusting planting schedules, and enhancing early warning systems to provide farmers with timely information. Additionally, the report emphasizes the importance of international cooperation and financial support to help communities adapt to rising temperatures.

Extreme heat pushing global agri-food systems to the brink, report warns

While the report provides a comprehensive overview of the risks associated with extreme heat, there are discrepancies in the projected impacts on specific crops and regions. For example, while some sources indicate a 10% decline in maize yields, others suggest variations based on local conditions and agricultural practices.

Extreme heat threatens agri-food systems, UN warns

• “Extreme heat is rewriting the script on what farmers, fishers and foresters can grow and when they can grow.” — Kaveh Zahedi, FAO

Extreme heat threatens global food systems: UN agencies

• “She said: “The risk of simultaneous crop failures from extreme heat could ripple through food prices, supply chains and economies.” — Molly Anderson, Professor of Food Studies

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• “Protecting the future of agriculture and ensuring global food security will require not only building on-farm resilience but also exercising international solidarity and collective political will for risk sharing, and a decisive transition away from a high-emissions future,” — FAO Report

Extreme heat pushing global food systems to brink, UN agencies warn

The findings of the FAO-WMO report underscore the urgent need for coordinated action to address the challenges posed by extreme heat, ensuring the sustainability of global food systems in the face of climate change.

Extreme heat pushing global agri-food systems to the brink, report warns