Some places around the world are continuing to get hotter and more humid as time goes on, thanks to partial climate change, as well as natural change around the world. There's a point where some places will be so hot and humid that the air can no longer take any perspiration from the ambient atmosphere, which means human sweat will no longer be able to cool the body like it's supposed to. People's bodies will literally start frying from the inside in spite of sweating on the outside because body heat can no longer be transferred to the atmosphere. It's called a Wet Bulb Atmosphere.