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.
Cows suffering from heat exhaustion are producing 10% less milk and losing about a month’s worth of outdoor grazing due to frequent and prolonged episodes of drought, says Lours. — Vivian Song, CNN Money, 6 Sep. 2026 On Monday, home-plate umpire Manny Gonzalez exited the game between the Cincinnati Reds and the San Diego Padres with heat exhaustion, needing assistance to leave the field. — Johnny Flores Jr, New York Times, 4 Sep. 2026 The Connected Hydration platform from Epicore tracks sweat composition, fluid loss, skin temperature, motion and thermal flux, with haptic alerts for fatigue or heat exhaustion. — Hanna Wickes, Charlotte Observer, 2 Sep. 2026 Seek medical attention if symptoms of heat exhaustion or heat stroke develop. — Haadiza Ogwude, Cincinnati Enquirer, 1 Sep. 2026 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

Rhymes for heat exhaustion

See All Rhymes for heat exhaustion

Browse Nearby Words

heat exchanger
heat exhaustion
heatful
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Cite this Entry

“Heat exhaustion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heat%20exhaustion. Accessed 7 Sep. 2026.

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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

Britannica.com: Encyclopedia article about heat exhaustion

Last Updated: - Updated example sentences
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