What is the heat index? When it's hot, we sweat to cool down. When it's hot and humid, there's lots of moisture in the air, and sweating doesn't work as well to cool your body. And that means that it feels hotter than the actual air temperature.
How can you stay cool in Minneapolis? Staying in the shade, seeking air conditioned buildings, drinking plenty of water and non-alcoholic, non-caffeinated drinks. Swimming at beaches, water parks and free splash pads is another great way to stay cool.