I agree with the AC comment, though I had to use mine yesterday 'cause my dehumidifier died and things get moldy pretty fast. I am not cut out for heat ... but if I suck it up and endure, I'm not too functional for a couple of days (but I have to shower before bed so I can fall asleep before I finish evaporating) and things get better.
Alas, work is very AC... so I'm not sure how well I'll do this summer. MOstly... I avoid the heat of the day and slow down.