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

Without cooler nights, our bodies have less time to recover from daytime heat, increasing the risk of heat exhaustion, heat stroke, and even death. —Jacob Wycoff, CBS News, 17 Apr. 2026

Four firefighters suffered minor injuries ranging from sprains to heat exhaustion and were taken to area hospitals. —Julian Roberts-Grmela, New York Daily News, 26 Mar. 2026

Those experiencing symptoms of heat exhaustion — including headache, nausea, dizziness, thirst, sweating and elevated body temperature — should seek medical attention immediately. —Hannah Dreyfus, AZCentral.com, 21 Mar. 2026

As with any heat wave, heat stroke, heat exhaustion and heat cramps are common dangers, Kines said. —Doyle Rice, USA Today, 21 Mar. 2026

Word History

First Known Use

1861, in the meaning defined above

Rhymes for heat exhaustion

• faustian

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