Comment Re:Air conditioning? Open a window. (Score 1) 813
With high humidity the human body cannot take effective advantage of evaporation cooling. It's not just that you're soaked in sweat which will not evaporate (a rather unpleasant feeling), but you dehydrate fast as well because the body is desperately trying to sweat more in order to effect the much-needed cooling (but which keeps failing). If you can't stay cool (preferably immobile in the shade), and hydrated under such extreme conditions (which are a normal for summer on the US East Coast), you can get heat-related deaths rather quickly.