Diagnosing Heat Stroke Heat stroke is diagnosed by looking at signs and symptoms, such as body temperature, and finding out about the person's recent activities. Treating and Preventing Heat Stroke Heat stroke is a medical emergency. Learn to recognize the symptoms listed above and take the appropriate action. The heat stroke victim needs to see a doctor as soon as possible, but the first step is to get the core temperature under control. If you suspect someone has heat stroke, begin treating them immediately while someone else calls 9-1-1 . Everything must be done to cool the heat stroke victim immediately. The best solution is to remove them from the sun, immerse the body in cold water, such as a river, stream, or bathtub. Otherwise, remove most of their clothes, douse them with water, and fan them vigorously. Wrapping in wet sheets can help increase the rate of heat loss. If the person is conscious and alert, offer him or her water or other fluids. Avoid caf...