Extreme heat risk will expand to 64 nations by 2045—representing 71 percent of current global food production—including major economies China, India, Brazil and the United States
A farmer harvests wheat crop at a village on the outskirts of Gurugram, India. Temperature spikes are causing mounting concern for health, particularly for those working outside in sweltering conditions, which is especially dangerous when humidity levels are high. Image: Vipin Kumar/Hindustan Times via Getty Images