Drink plenty of fluids but avoid drinks with alcohol, caffeine or a lot of sugar. Do not wait until you are thirsty. Start drinking fluids 30 minutes before going out.
Plan strenuous outdoor activity for early morning or evening when the temperature is lower.
Take frequent breaks when working outside.
Wear sunscreen SPF 15 or higher, wide-brimmed hats and light-colored, loose-fitting clothes.
Check with a doctor about the effects of sun and heat when taking prescription drugs, especially diuretics or antihistamines.
Dress infants and children in cool, loose clothing. Shade their heads and faces with hats or an umbrella.
Check frequently on the elderly and others who made need help.
Never leave people or pets in a closed, parked vehicle in hot weather.