heat wave

noun

: a period of unusually hot weather

Examples of heat wave in a Sentence

Recent Examples on the Web
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This warning is in effect until Friday at 8 p.m. Protect yourself during a heat wave with these tips from the NWS Consume plenty of fluids to stay hydrated. Ca Weather Bot, Sacbee.com, 5 Aug. 2025 This has come following a summer of extreme weather across China, with record heat waves in the east and heavy flooding in the southwest. Theo Hayward, ABC News, 29 July 2025 This advisory is in effect until Wednesday at 8 p.m. During heat waves, consider the following tips from the NWS Stay hydrated: Make sure to drink plenty of fluids. Nc Weather Bot, Charlotte Observer, 29 July 2025 Heat stroke, a more severe condition that occurs after the body reaches an internal temperature above 103 degrees, is a major danger during heat waves, and can cause a rapid pulse, headaches, dizziness, nausea and fainting. Zachary Folk, Forbes.com, 28 July 2025 See All Example Sentences for heat wave

Word History

First Known Use

1893, in the meaning defined above

Time Traveler
The first known use of heat wave was in 1893

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Cite this Entry

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

Kids Definition

heat wave

noun
: a period of unusually hot weather

More from Merriam-Webster on heat wave

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