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 One volunteer firefighter and two career firefighters were transported to a hospital for heat exhaustion but have since been released. Cody Boteler, baltimoresun.com, "Fire at Loafers Bar and Grill in Catonsville still under investigation," 4 Sep. 2019 One suffered from heat exhaustion and was taken to Signature Healthcare Brockton Hospital. BostonGlobe.com, "BROCKTON — Two Brockton firefighters were injured Monday morning while fighting a “stubborn” three-alarm blaze, fire officials said.," 17 Sep. 2019 One hiker died and five others were in need of rescue after running out of water and suffering from heat exhaustion near Kanan Dume Road in Malibu, CBS Los Angeles reported. CBS News, "1 hiker dead and 5 others rescued in Southern California," 2 Sep. 2019 Joey was taken to Animal Urgent Care in Escondido, where he was treated for heat exhaustion. San Diego Union-Tribune, "Dog rescue highlights heatstroke harm for pets," 20 Aug. 2019 Phoenix Fire Department crews rescued a 50-year-old woman suffering from heat exhaustion Monday after hiking at Camelback Mountain. Riley Murdock, azcentral, "Phoenix fire evacs heat-exhausted woman from Camelback Mountain," 22 July 2019 Be sure to watch for signs of possible heat exhaustion or heatstroke, including symptoms like headache, dizziness, nausea, hot and dry skin, blurry vision, excessive sweating, muscle cramps or fainting. Jason Green, The Mercury News, "Cities, counties tap cooling centers to beat Bay Area heat," 13 Aug. 2019 The Medical Examiner's office will determine the cause of death, which is believed to be heat exhaustion. Sophie Lewis, CBS News, "Father charged with homicide after infant twins die in hot car," 27 July 2019 During the summer months, the Pakistani airwaves are full of public-service announcements warning residents about the dangers of heat, symptoms of heat exhaustion, and how to take precautions. Aryn Baker, Time, "What It’s Like Living in One of the Hottest Cities on Earth—Where It May Soon Be Uninhabitable," 12 Sep. 2019

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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Time Traveler for heat exhaustion

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The first known use of heat exhaustion was in 1861

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Statistics for heat exhaustion

Last Updated

12 Nov 2019

Cite this Entry

“Heat exhaustion.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/heat%20prostration. Accessed 13 December 2019.

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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).


easily led, controlled, or managed

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