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

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 On top of the parking issues, the thousands of extra visitors Saturday brought other types of calls, especially heat exhaustion, Weston said. Devin Kelly, Anchorage Daily News, "‘A screeching halt.’ Forest Fair crowds snarl traffic between Anchorage and Girdwood," 8 July 2018 Dunnichay said the child’s cause of death was acute heat exhaustion/overheating. Indianapolis Star, "Coroner: Anderson parents thought child who died in hot car was in bed," 6 June 2018 As the body temperature rises beyond the norm of 98.6 degrees, this can bring on muscle pain and spasms known as heat cramps, or lead to what’s called heat exhaustion: cramps accompanied by dizziness, nausea, headaches and more. Linda Searing, Washington Post, "The Big Number: Extreme heat kills 618 people every year," 9 July 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

22 Jan 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

Comments on heat exhaustion

What made you want to look up heat exhaustion? Please tell us where you read or heard it (including the quote, if possible).


to gather or build up little by little

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