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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That warming trend kicked off amid March’s record-breaking heat wave and is expected to intensify during this year’s strong El Niño cycle. Clara Harter, Los Angeles Times, 2 Apr. 2026 Climate change has contributed to more frequent and intense extreme weather, from storms to heat waves to drought. Chaewon Chung, Sacbee.com, 1 Apr. 2026 On the heels of a winter heat wave that left people wondering where spring went, a new study reveals that most of the winter snowpack in the White Mountains in eastern Arizona had melted by mid-March. Shi En Kim, AZCentral.com, 31 Mar. 2026 The findings are particularly alarming, the scientists say, because AI data centers are set to boom over the next few years, and these temperature rises come as planet-warming pollution is already making heat waves more extreme around the world. Laura Paddison, CNN Money, 30 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 6 Apr. 2026.

Kids Definition

heat wave

noun
: a period of unusually hot weather

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