heat exhaustion

noun

: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Work outdoors during heat season can lead to heat illness such as heat cramps, heat exhaustion, heat stroke and death. Georgia Christakis, Sun Sentinel, 8 Apr. 2025 On sunny days these fields can reach temperatures up to 160 degrees Fahrenheit — hot enough to cause heat exhaustion or burns. Grace Hase, The Mercury News, 30 Jan. 2025 The music started after people in the crowd passed out from heat exhaustion, which hurt his feelings. Rob Sheffield, Rolling Stone, 19 Oct. 2024 Extreme heat is a growing threat for elite athletes, with cases of heat exhaustion and heatstroke becoming more common as fossil fuel pollution pushes temperatures and humidity levels up. Lou Robinson, CNN, 11 Aug. 2024 See All Example Sentences for heat exhaustion

Word History

First Known Use

1861, in the meaning defined above

Time Traveler
The first known use of heat exhaustion was in 1861

Browse Nearby Words

Cite this Entry

“Heat exhaustion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heat%20exhaustion. Accessed 16 Apr. 2025.

Kids Definition

heat exhaustion

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

called also heat prostration

compare heat stroke

Medical Definition

heat exhaustion

noun
: 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

Last Updated: - Updated example sentences
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