We use a swamp cooler on one end(you can see it in the back ground of pic) and we use a big fan at the other. I agree, this 100 percent humitdy and 100 degree weather makes for a loooong day. And the worse ones are the ones when it is like this and you have been on grinder all day and your skin is covered with shavings and dirt
If you go with a swamp cooler, you can also throw frozen 2 liter jugs of water or sacks of ice in it and it makes a big difference in temps.