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Published on: 7/15/2026

What should I do when I have heat stroke?

Heat stroke is a life-threatening medical emergency that requires immediate action. If you suspect heat stroke, move to a cool environment, remove excess clothing, and begin rapid cooling by applying cold water, ice packs, or fans to the skin. Hydrate with cool fluids if the person is conscious, and call 911 without delay.

Recognizing heat stroke early can prevent organ damage or death. Symptoms often include high body temperature, confusion, rapid pulse, and hot, dry skin. Because symptoms can overlap with other serious conditions, understanding what you're experiencing is critical. Take a free, instant, online symptom check to clarify your symptoms and get guidance on your next steps—so you can act fast and with confidence.

Reviewed for medical accuracy: 07/14/2026

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Explanation

Recognizing Heat Stroke:

Heat stroke occurs when the body overheats, typically due to prolonged exposure to high temperatures or strenuous physical activity in hot weather. Symptoms may include:

  • High body temperature (above 104°F or 40°C)
  • Altered mental state or confusion
  • Rapid heartbeat
  • Nausea or vomiting
  • Hot, dry skin (lack of sweating)
  • Headache
  • Dizziness or fainting

If you or someone else exhibits these symptoms, it is important to take action immediately. You can use this free AI symptom checker to help evaluate your symptoms and understand when emergency care is needed.

Immediate Actions to Take:

  • Move to a Cooler Place: Get the person to a shaded or air-conditioned area as quickly as possible. Reducing exposure to heat is the first step in managing heat stroke.
  • Cool the Body: Begin cooling the body using one or more of the following methods:
  • Hydrate: If the person is conscious and able to drink, provide cool water or electrolyte drinks to help rehydrate. Avoid giving them alcohol or caffeine, as these can worsen dehydration.

Seek Medical Attention:

Even after taking these initial steps, it is essential to seek medical help. Heat stroke can lead to serious complications, including organ damage, and may require intravenous fluids and further medical treatment.

Prevention Tips:

To prevent heat stroke in the future, consider the following strategies:

  • Stay hydrated by drinking plenty of fluids, especially in hot weather.
  • Avoid strenuous activities during the hottest parts of the day.
  • Wear lightweight, loose-fitting clothing.
  • Take regular breaks in the shade or indoors when working or exercising in the heat.

(References)

  • Glazer JL. Management of heatstroke and heat exhaustion. Am Fam Physician. 2005 Jun 1;71(11):2133-40. PMID: 15952443.

  • Asmara IGY. Diagnosis and Management of Heatstroke. Acta Med Indones. 2020 Jan;52(1):90-97. PMID: 32291378.

  • Costrini A. Emergency treatment of exertional heatstroke and comparison of whole body cooling techniques. Med Sci Sports Exerc. 1990 Feb;22(1):15-8. PMID: 2406541.

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