Every year hundreds of people die across the country due to heat-related causes, but the good news is that preventive steps can help active people have fun safely. It's important to bring fluids with you, and when active or exercising to drink before, during and after you have stopped. The sodium in sports drinks has been scientifically proven to encourage drinking and promote hydration. Drink, don't drench - Pouring water over your head may feel good but it won't help at all at restoring body fluids or lowering body temperature.
Fluids have to go IN the body.
Skip the sun - Exercise in the morning or evening when the weather is coolest. Wear light-colored clothing that is porous. Kids should drink every 15 minutes when they are active. Wetter is better - Don't change into a dry shirt at breaks or time outs. Completely soaked shirts do better at cooling the body.