I don't. I stay inside, or maybe hit the supermarket. I stay outside very briefly in such temperatures unless there's a pool involved.
I sweat VERY little. Where other people have sweat streaming down their faces, I'll just barely start to get a glaze. To understand, let me explain an actual scenario.
I was at a local dive bar when I lived in central NJ (The Birch Hill, in Old Bridge) sometime in the late 90s or at the turn of the century. The place was extremely crowded, there were fans, but no A/C (or A/C that was not nearly up to the job), and it was June. During a period where the opening band had finished but the headlining band hadn't come out yet (I want to say it was Ratt? Not sure), I was standing around with a half dozen or so other people and BSing. Men and women, they all had sweat pouring down their faces.
One guy says to me suddenly - "Dude, you suck! You haven't even broken a sweat!"
My reply: "Yeah, I know. But it sucks because I'm not cooling off."
So, it sounds convenient, but the "oh, yeah, you're at a higher risk of heat exhaustion and heat stroke" part makes it... less convenient.
How I ever managed with previous cars that had no AC or dead AC, I'll never know - except that I guess I never had to go very far back then.