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Published on: 4/7/2025

What Are the Symptoms of Heat Exhaustion and How Can It Be Prevented?

Heat exhaustion can cause heavy sweating, weakness, and dizziness, while preventing it involves staying cool, drinking plenty of water, and avoiding too much time in the sun.

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Explanation

Heat exhaustion is an illness that happens when your body gets too hot. Common signs include lots of heavy sweating, feeling very tired or weak, feeling dizzy or lightheaded, and sometimes nausea or a headache. You might also see your heart beating fast and your skin feeling cool and moist despite the heat. These symptoms warn that your body is having trouble keeping cool. To prevent heat exhaustion, you can take simple steps. First, drink plenty of water throughout the day to stop your body from getting dehydrated. Try to avoid being outside when it is very hot and sunny, especially during the middle of the day. When you have to be outside, wear light clothing, a hat, and use sunscreen to protect your skin. It is also important to take breaks in a cool, shaded area or indoors with air conditioning. Remember, if you feel any of these symptoms while out in the heat, it’s best to get to a cool place and rest until you feel better.

(References)

  • Barrow MW, Clark KA. Heat-related illnesses. Am Fam Physician. 1998 Sep 1;58(3):749-56, 759. PMID: 9750542.

  • Wexler RK. Evaluation and treatment of heat-related illnesses. Am Fam Physician. 2002 Jun 1;65(11):2307-14. PMID: 12074531.

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

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