‘Dangerous’ and ‘extremely dangerous’ heat stress to become more common by 2100

Even if countries manage to meet the Paris Agreement goal of keeping global warming to 2 degrees Celsius, combinations of heat and humidity that are dangerous to humans will become more frequent by 2100. A new statistical analysis finds that the tropics could be exposed to dangerous levels of heat stress most days of the year, and that the deadly heat waves of recent summers will become yearly occurrences in the mid-latitudes.