SOURCE: Slate and Columbia University

DATE: December 22, 2017

SNIP: “It’s not the heat that kills you. It’s the humidity.” As climate change progresses, this is likely to become gruesomely true, according to a new study published Friday in Environmental Research Letters. Climate change–induced increases in humidity could actually exacerbate the effects of heat to the point of making certain places in the world uninhabitable later this century. By 2080, the researchers predict, we’ll see measurements of heat and humidity that go far beyond safe thresholds in which individuals can still function normally. For individuals too poor to afford cooling systems, who have no housing, or anyone with poor health already, the humidity could be lethal.

The study’s model predicts that in many places in the world, under worse estimates for global warming rates, those temperatures could stretch for up to 100 to 250 days a year by 2080. [H]undreds of millions could experience a staggering 95 degrees Fahrenheit at 100 percent humidity—which is literally off the charts on the heat index. In “dry” heat terms, this would feel like 170 degrees Fahrenheit.