People are at risk of mass-deaths in the millions in the red regions https://news.climate.columbia.edu/2020/05/08/fatal-heat-humidity-emerging/
State of the Planet
Potentially Fatal Combinations of Humidity and Heat Are Emerging Across the Globe
A new study has identified thousands of incidents of previously rare or unprecedented extreme heat/humidity combinations in parts of Asia, Africa, Australia, South America and North America, including in the U.S. Gulf Coast region.