Wouldn't it be nice to stick our feet in a cold mountain stream on a day like today?
Wading a cold creek on a hot day is the best way to cool off. Some of us, however, don't have a lovely creek in the backyard to wade in. Next best thing: soak your feet in a dishpan or tub of cold water.
Keeping your feet in cold water for just a few minutes will cool you all over. I don't know how this works exactly; I do know that our feet have more than 250,000 sweat glands each, so that probably has something to do with it.
If you must go outside, a wet washcloth on the back of your neck works wonders, too.
Hang in there. The weatherman has promised cooler weather next week with temps staying under a hundred.