Make sure the person drinks slowly. Give a half-glass of cool water every 15 minutes. Do not give liquids that contain alcohol or caffeine. Let the person rest in a comfortable position, and watch carefully for changes in his or her condition. Heatstroke is a life-threatening situation.
Help is needed fast.
Move the person to a cooler place. Quickly cool the body. Immerse the person in a cool bath, or wrap wet sheets around the body and fan it. Watch for signals of breathing problems. Keep the person lying down and continue to cool the body any way you can.