heat wave

noun

Synonyms of heat wavenext
: a period of unusually hot weather

Examples of heat wave in a Sentence

Recent Examples on the Web
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This heat wave is so extreme that it would only be expected to occur once about every 500 years in the current climate, according to World Weather Attribution, a group of scientists who study links between extreme weather events and climate change. Mira Rojanasakul, New York Times, 21 Mar. 2026 And that doesn’t include the East Antarctica heat wave of 2022 when temperatures were 81 degrees warmer than normal. Dallas Morning News, 20 Mar. 2026 The Bay Area and Central Coast are expected to see one more day of record hot temperatures before relief arrives, as an unprecedented March heat wave entered its fifth day. Tim Fang, CBS News, 20 Mar. 2026 An early heat wave baking the West this week obliterated numerous records in California and Arizona on Wednesday and Thursday. Denise Chow, NBC news, 20 Mar. 2026 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

Browse Nearby Words

Cite this Entry

“Heat wave.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heat%20wave. Accessed 28 Mar. 2026.

Kids Definition

heat wave

noun
: a period of unusually hot weather

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