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.
Familiarize yourself with warning signs: Know the symptoms of heat exhaustion and heat stroke. Ca Weather Bot, Sacbee.com, 14 July 2025 Common symptoms of heat exhaustion include intense sweating, muscle cramps, dizziness and nausea. Joe Edwards, MSNBC Newsweek, 14 July 2025 Remember, ignoring these signals can lead to heat exhaustion or life-threatening heat stroke. Kansas City Star, 11 July 2025 They were being treated mainly for smoke inhalation and heat exhaustion, and were all expected to be OK. David Matthews, New York Daily News, 10 July 2025 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

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Cite this Entry

“Heat exhaustion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heat%20exhaustion. Accessed 21 Jul. 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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