I have a couple of large patio umbrellas which help. I will generally do my summer shooting earlier in the day, in fact everything outdoors early. We hit 95 for a while yesterday. I mowed a couple of days ago and slept too late, so it was getting warm, late morning, not hot but I was sweating. I told my wife next week when I mow , the blades will be turning around 7am.
Here in my part of Texas, the eastern part is basically the deep south. Humid all year and humidity is what hurts. I spent a couple of years overseas in the military where the summers were hot, but low humidity and it was much more comfortable, Winters not quite as cold here, and still more tolerable.