The world's food systems are facing a dire threat from extreme heat, with far-reaching consequences for global food security and the livelihoods of billions. This is the stark warning from the UN, backed by a comprehensive report from the Food and Agriculture Organization (FAO) and the World Meteorological Organization (WMO). The report highlights a critical issue that demands immediate attention and action.
Farmers in regions like India, South Asia, tropical sub-Saharan Africa, and Central and South America are already experiencing the devastating impact of heatwaves. These extreme weather events are pushing food systems to the brink, with farmers unable to work safely for up to 250 days a year. This is a staggering statistic, indicating the severity of the situation and the urgent need for adaptation.
The effects of heat stress on livestock are equally alarming. Common species like dairy cows, pigs, and chickens are facing increased mortality rates and reduced productivity due to heat stress. As temperatures rise, these animals experience digestive tract breakdowns, organ failure, and cardiovascular shock. The very foundation of our food production systems is at risk.
Crop yields are declining rapidly, with temperatures above 30C causing significant damage to most agricultural crops. Maize and wheat yields have already taken a hit, with declines of around 10% and nearly that much, respectively. These losses are projected to worsen as temperatures continue to rise, surpassing pre-industrial levels by 1.5C or more. The very crops that sustain us are struggling to survive.
The impact isn't limited to land-based agriculture. Ocean heatwaves are killing fish populations, reducing the level of dissolved oxygen in the water and leading to mass declines. This further exacerbates the food crisis, affecting both marine and terrestrial ecosystems.
The report emphasizes the need for early warnings and adaptation measures. Weather forecasts and mobile phone communications can be utilized to alert farmers to impending heatwaves, allowing them to take necessary precautions. However, this is just one piece of the puzzle. Richard Waite, from the World Resources Institute, stresses the importance of providing farmers with the tools, knowledge, and early warnings they need to adapt and protect themselves.
The call for action extends beyond individual farmers. Morgan Ody, a small-scale farmer and coordinator of La Via Campesina, highlights the vulnerability of agricultural workers and small-scale fisherfolk, especially women and the elderly. He advocates for compensation, debt relief, and public investment in adaptive measures, as well as stricter worker safety rules to limit exposure to high temperatures.
The root cause of this crisis lies in modern industrialised food systems. These systems rely on a narrow range of staple crops and highly specialised inputs like fertiliser, making them highly vulnerable to shocks. Molly Anderson, a professor of food studies, calls for a more diverse food system, better equipped to withstand extreme heat. She emphasizes the need to tackle fossil fuels, accelerate the shift to renewable energy, and invest in adaptation measures.
The implications of this crisis are far-reaching. Tim Lang, an emeritus professor of food policy, warns that temperate regions and developed countries cannot ignore the impacts. He predicts changes in land use, water dependencies, and crop productivity, even in places like the British Isles. The very patterns of growing and consuming food will be forced to change, challenging our current agricultural practices.
In conclusion, the UN's warning is a stark reminder of the urgent need to address the impact of extreme heat on our food systems. It requires a multi-faceted approach, including adaptation measures, early warnings, and a shift towards more sustainable and diverse agricultural practices. The future of our food security and the livelihoods of billions depend on our ability to act swiftly and decisively.
