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Heat Exhaustion

Heat exhaustion is one of the heat-related syndromes. Symptoms range in severity from mild heat cramps to heat exhaustion to potentially life-threatening heatstroke. Heat exhaustion can begin suddenly, usually after working or playing in the heat, perspiring heavily or being dehydrated.

Heat exhaustion signs and symptoms include:

  • Faintness or dizziness
  • Nausea or vomiting
  • Heavy sweating often accompanied by cold, clammy skin
  • Weak, rapid pulse
  • Pale or flushed face
  • Muscle cramps
  • Headache
  • Weakness or fatigue

If you suspect heat exhaustion

Untreated, heat exhaustion can lead to heatstroke, which is a life-threatening condition. If you suspect heat exhaustion, take these steps immediately:

  • Move the person out of the heat and into a shady or air-conditioned place.
  • Lay the person down and elevate the legs and feet slightly.
  • Remove tight or heavy clothing.
  • Have the person drink cool water or other nonalcoholic beverage without caffeine.
  • Cool the person by spraying or sponging with cool water and fanning.
  • Monitor the person carefully.

Call 911 or your local emergency number if the person’s condition deteriorates, especially if he or she experiences:

  • Fainting
  • Confusion
  • Seizures
  • Fever of 104 F (40 C) or greater

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