There's different kinds of "hot" and it determines physical activity. In the hi desert, you could run in 110 degree heat once you were acclimatized. You get less oxygen and can't breath after a quarter mile. Here, it's heat AND humidity and you best know what you are dong if you're outside doing physical activity or it will kill you.
I'm too old for all that crap. I've half a hair-brained scheme to try and get up at 5 and run every morning. No traffic, no people, grandkids aren't awake and tearing anything up yet (school's out in 2 days), not too hot yet. Everything is right about it except the getting my ass up at 5AM part