It turns out there’s a lot of science behind the phrase, “But it’s a dry heat.” Our bodies are much more effective at cooling off in places like Death Valley where we’ve come to expect temps to soar. But climate change is bringing the heat to wetter climate zones, and that’s when things get dangerous. It’s not the heat, it’s the humidity. ” With its position in the tropics, in one of the most humid regions of the Western Hemisphere, a single day of 120-degree temperatures in Palm Beach would be a mass casualty event. Dead bodies would pile up in the morgues, victims of hyperthermia, or heatstroke—cooked, alive, in their own bodies. What gives? Why is 120 degrees in Palm Beach not the same as 120 degrees in Palm Springs?” Slate: When Will It Get Too Hot for the Body to Survive?

+ In her new book, ‘The Joy of Sweat,’ Sarah Everts answers all of our questions about perspiration.

+ We’re seeing the combination of heat and humidity in the Olympics. It seems to be most visible on the tennis courts where players are drenched. “Daniil Medvedev of Russia, struggled to breathe through the hot and humid conditions of one of his matches. He told the chair umpire: ‘I can finish the match but I can die.'” (Never them see you die is the new Never let them see you sweat.)