With this much heat and moisture in the air, sweat doesn't evaporate quickly and the body has a hard time cooling down. Give yourself time to adjust to the heat when the very hot, humid days hit. Exercise easily at first and slowly progress back to your normal routine. Wear sunglasses, a hat with a wide brim, and loose-fitting clothing. The clothing should allow the air to circulate around your body while protecting you from the sun as much as possible.
Light colors are best, because they reflect the light.
Drink plenty of fluids, generally at least eight glasses a day. Have a tall glass before you start exercising, a cup every 20 minutes during the activity, and another tall glass when you're finished. Even though we perspire less with age, a lot of water is still lost as sweat. Tap water, fruit drinks, and vegetable drinks all work well. Some folks prefer commercial sports drinks.