heat exhaustion


Definition of heat exhaustion

: a condition marked by weakness, nausea, dizziness, and profuse sweating that results from physical exertion in a hot environment

called also heat prostration

— compare heatstroke

Examples of heat exhaustion in a Sentence

Recent Examples on the Web

The stream of data warns of heat exhaustion (via a thermometer) and bad running form (via accelerometers). Joe Pappalardo, Popular Mechanics, "What Happened When I Trained With Air Force Human Performance Specialists," 12 Feb. 2019 Symptoms of heat exhaustion include faintness, dizziness, heavy sweating, a weak pulse and fatigue, among other signs. Madeline Farber, Fox News, "Kansas mom warns of hot temperatures after teen son with autism dies of heat exhaustion," 19 July 2018 Since the start of 2018, there have been 36 reported mountain rescues in the Phoenix area, with heat exhaustion as the leading cause. Austin Grad, azcentral, "Tips to stay safe while hiking in the Valley heat," 10 Apr. 2018 In a heat wave, humans sweat and try to avoid heat exhaustion. Scott K. Johnson, Ars Technica, "It’s too soon to tell if the Great Barrier Reef’s bleaching was a catastrophe," 27 July 2018 Signs of heat exhaustion include fatigue, heavy sweating, dizziness, fainting, thirst, headache, and more. Nina Bahadur, SELF, "Why Does Spending Time in the Sun Make You So Tired?," 8 Sep. 2018 Dehydration and heat exhaustion was reported to be a factor in at least some of those hospitalizations. Kitty Stryker, Teen Vogue, "A Teen Died After Attending Lollapalooza 2018," 7 Aug. 2018 When temperatures are high, even a few hours of exertion may cause severe dehydration, heat cramps, heat exhaustion and heat stroke. Anita Snow, The Seattle Times, "California urges power conservation during heat wave," 23 July 2018 Heat illness is an umbrella term for issues like heat exhaustion and heat stroke, the Cleveland Clinic explains. Nina Bahadur, SELF, "Why Does Spending Time in the Sun Make You So Tired?," 8 Sep. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'heat exhaustion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of heat exhaustion

1861, in the meaning defined above

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Statistics for heat exhaustion

Last Updated

19 Mar 2019

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The first known use of heat exhaustion was in 1861

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More Definitions for heat exhaustion

heat exhaustion


English Language Learners Definition of heat exhaustion

medical : a condition that happens when someone is too active in extremely hot conditions and that causes a person to sweat and feel very weak, dizzy, etc.

heat exhaustion


Medical Definition of heat exhaustion

: a condition characterized by faintness or fainting, palpitations, nausea, vomiting, headache, and profuse sweating and resulting from physical exertion in a hot environment

called also heat prostration

— compare heatstroke

More from Merriam-Webster on heat exhaustion

Britannica.com: Encyclopedia article about heat exhaustion

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