Because uncontrolled heat exhaustion can evolve into heat stroke, you should know how to tell the difference between them. If the victim feels extremely hot when touched, suspect heat stroke. In between these conditions, victims usually become irrational, agitated or even aggressive and may have seizures. A third way to tell is through rectal temperature, which may not be the most practical method when time is of utmost importance. If you suspect heat stroke, seek emergency help immediately.
Heat syncope occurs when a person becomes dizzy or faints after exposure to high temperatures.
Victims should lie down in a cool place when it occurs. Victims who are not nauseated can drink water. Heat edema causes ankles and feet to swell from heat exposure. It is more common in women unacclimated to a hot climate. Wearing support stockings and elevating the legs often helps reduce swelling.