heat wave


Definition of heat wave

: a period of unusually hot weather

Examples of heat wave in a Sentence

Recent Examples on the Web

After 2018's record heat wave (including a scorching 111º F recorded at UCLA), this is just cruel. Caroline Picard, Good Housekeeping, "Summer 2019 Is Going to Be Extra Hot and Humid, According to 'Farmers' Almanac'," 25 Apr. 2019 But if a heat wave and a severe drought were to hit at the same time and the groundwater was depleted, the trees may not be so lucky, Drake says. Yasemin Saplakoglu, Scientific American, "Trees Sweat to Keep Cool," 12 Apr. 2018 Weekend temperatures are expected to remain in the 80s, a welcome break from last weekend's heat wave. Deasia Paige, Detroit Free Press, "Afternoon storms bring cooler temps to metro Detroit for rest of week," 5 July 2018 According to the study, plants that live in extreme conditions, with frequent droughts or heat waves, are not able to absorb as much CO2 as plants that exist in stable environments. Avery Thompson, Popular Mechanics, "Trees Don't Absorb Enough Carbon to Stave Off Climate Change, Says Study," 24 Jan. 2019 Temperatures are expected to stay around 84 degrees on Tuesday, so this isn’t expected to turn into a heat wave, which would require three consecutive 90-degree days. Dave Epstein, BostonGlobe.com, "The warm weekend will be followed by a hot Monday that could even break records," 15 June 2018 But a little heat is on the way come Monday, though nothing like the muggy heat wave the city recently escaped. Lucas Phillips, BostonGlobe.com, "After an ideal weekend, heat (though no wave) is on the way," 7 July 2018 Flash Flood Warning including Trenton NJ, Levittown PA, Hamilton Square NJ until 11:00 AM EDT pic.twitter.com/sJ2rzNxyDM The heat wave has claimed at least one life in Philadelphia, according the Medical Examiner’s Office. Joseph A. Gambardello, Philly.com, "Heat wave ends on a wet note in Philadelphia," 6 July 2018 The heat and humidity will begin to stage a comeback Sunday afternoon with another heat wave shaping up for next week with readings once again climbing into the lower and middle 90s. Tom Skilling, chicagotribune.com, "Heat exits amid strong storms, heavy rain," 5 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'heat wave.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of heat wave

1893, in the meaning defined above

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Dictionary Entries near heat wave


heat unit

heat up

heat wave




Statistics for heat wave

Last Updated

20 May 2019

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Time Traveler for heat wave

The first known use of heat wave was in 1893

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More Definitions for heat wave

heat wave


English Language Learners Definition of heat wave

: a period of unusually hot weather

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More from Merriam-Webster on heat wave

Rhyming Dictionary: Words that rhyme with heat wave

Spanish Central: Translation of heat wave

Britannica English: Translation of heat wave for Arabic Speakers

Britannica.com: Encyclopedia article about heat wave

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to speak slightingly about or to degrade

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