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

Two firefighters were hospitalized with heat exhaustion after battling a fire that spread across multiple floors of a downtown Sacramento building early Thursday, the Sacramento Fire Department said. — Darrell Smith, Sacbee.com, 8 Oct. 2026

The rules are intended to protect workers from heat exhaustion and heatstroke. — Tony Briscoe, Los Angeles Times, 6 Oct. 2026

Some had to be treated for medical conditions like heat exhaustion or dehydration. — Ian Miller Outkick, FOXNews.com, 9 Sep. 2026

People are also urged to wear lightweight and loose-fitting clothing, to limit strenuous activities to early morning or early evening hours and to take action when experiencing heat exhaustion or heat stroke. — Tim Fang, CBS News, 8 Sep. 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