Limit extended exposure to the outdoors during the warmest times of the day as much as possible. Do strenuous activities or exercise in the early morning or evening hours, if possible.
Wear loose-fitting clothing during prolonged exposure to the warm summer climate. These clothes allow air to pass along your skin, which speeds up evaporation and carries off excess heat. Also, light-colored clothing doesn't absorb as much heat as darker clothing.
Wear less clothing when you're out in the sun for a long time. Skin exposure allows a greater opportunity for the sweat to evaporate, cooling the skin.
When exposed to prolonged sunlight, wear proper sunscreen.
Take multiple breaks during outdoor activities. Prolonged extraneous activities without breaks can result in medical emergencies.