We went for a walk, it was 90°F and not too bad, breeze going, shade. My wife had to go to FedEx for something, they had the AC set to freezer temperatures, I stopped at the library, same thing. As we neared the library it started to rain, not much, but enough to get humidity into the 1000% range it seemed. The walk back was uncomfortable.
Humidity is not fun. I remember pitching in this heat back before the coaches would let us drink water, really, no water. I'm sort of amazed we didn't die.