The New Yorker Radio Hour

The Korey Stringer Institute, at the University of Connecticut, is named after an N.F.L. player who died of exertional heatstroke. The lab’s main research subjects have been athletes, members of the military, and laborers. But, with the extreme heat wrought by climate change, even mild exertion will put more and more of us in harm’s way; in many parts of the United States, a combined heat wave and power outage could cause staggering fatalities. Dhruv Khullar, a New Yorker contributor, practicing physician, and professor of health policy, visited the Stringer Institute to undergo a heat test—walking uphill, for ninety minutes, in a hundred-and-four-degree heat—to better understand what’s happening. “I just feel extremely puffy everywhere,” Khullar sighed. “You’d have to cut my finger off just to get my wedding ring off.” By the end of the test, he spoke of experiencing cramps, dizziness, and a headache. Khullar discussed the dangers of heatstroke with Douglas Casa, the lab’s head, who nearly died of the condit