heat wave

noun

: a period of unusually hot weather

Examples of heat wave in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This advisory is in effect until Saturday at 8 p.m. During heat waves, consider the following tips from the NWS Consume plenty of fluids to stay hydrated. Ca Weather Bot, Sacbee.com, 21 Aug. 2025 The United Kingdom sweated through four significant heat waves this summer, with temperatures climbing into the upper 80s and 90s Fahrenheit. Andrew Freedman, CNN Money, 18 Aug. 2025 The industry is also grappling with the impacts of record heat waves in Japan last summer that curbed harvests of tencha, the tea leaves dried and ground into matcha. Miriam Waldvogel, The Hill, 17 Aug. 2025 To see why, think of how much electricity your home uses during the day compared with the middle of the night, or during a summer heat wave compared with a cool fall day. Harold Wallace, Space.com, 16 Aug. 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 24 Aug. 2025.

Kids Definition

heat wave

noun
: a period of unusually hot weather

More from Merriam-Webster on heat wave

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