Heat stroke is a life-threatening illness that occurs when the outside temperature adds heat to the body faster than the body can deal with it, so that the internal body temperature rises to the level of high fever. Heat stroke, which may develop within minutes or hours, is an emergency condition and requires immediate treatment to prevent death. Treatment includes rapidly lowering the person's body temperature followed by intensive supportive care. Remove victim's clothing and cover with a wet sheet. Give nothing by mouth Heat exhaustion is milder than heat stroke and typically occurs after several days of high temperatures.
Treatment includes replacing fluid and electrolyte losses.
Drink plenty of non-alcoholic liquids. Seek medical attention for severe cases. Being in an air-conditioned environment, even for part of the day, will reduce the risk for heat stroke. Taking salt tablets is not recommended and can be harmful to people with such illnesses as high blood pressure and heart conditions. In order for a fan to be effective in cooling the body, the skin surface must be moist.