There are some immediate first aid measures you can take while waiting for help to arrive. Get the person indoors. Remove clothing and gently apply cool water to the skin followed by fanning to stimulate sweating. Apply ice packs to the groin and armpits. Have the person lie down in a cool area with their feet slightly elevated.
Intravenous fluids are often necessary to compensate for fluid or electrolyte loss.
Bed rest is generally advised and body temperature may fluctuate abnormally for weeks after heat stroke. There are precautions that can help protect you against the adverse effects of heat stroke. Wear lightweight, tightly woven, loose-fitting clothing in light colors. Schedule vigorous activity and sports for cooler times of the day. Protect yourself from the sun by wearing a hat, sunglasses and using an umbrella.