Heat exhaustion is a common heat-related syndrome. Heat-related syndromes range from mild heat cramps, to heat exhaustion, to life threatening heat stroke.
Signs and symptoms of heat exhaustion occur suddenly, sometimes after excessive physical exertion [exercise], heavy perspiration, and inadequate liquid intake. Signs and symptoms of heat exhaustion include:
- Feeling faint or dizzy
- Nausea
- Heavy sweating
- Rapid, weak heartbeat
- Low blood pressure
- Cool, moist, pale skin
- Low-grade fever
- Heat cramps
- Headache
- Fatigue
- Dark-colored urine
If you suspect heat exhaustion:
- Take the person out of the sun and into a shady or air-conditioned location
- Lay the person down and raise his or her legs and feet slightly.
- Loosen or take off the person’s clothes
- Make the person drink cool water
- Cool the person down by spraying or wiping him with cool water and fanning.
- Monitor the person carefully. Heat exhaustion can quickly lead to heatstroke.
If the person is having a fever greater than 102 F (38.9 C), is having seizures, appears confused, or has fainted, dial 911 for emergency help immediately.
Source: MayoClinic