heat wave


Definition of heat wave

: a period of unusually hot weather

Examples of heat wave in a Sentence

Recent Examples on the Web Right on the heels of arguably the West Coast's most intense heat wave in modern history comes the most ferocious flare-up of catastrophic wildfires in recent memory. Jeff Berardelli, CBS News, "Wildfires and weather extremes: It's not coincidence, it's climate change," 17 Sep. 2020 Wildfires are raging across California, as the state faces a record-breaking fire season due to the destructive combination of a heat wave and strong winds. National Geographic, "What do wild animals do in wildfires?," 8 Sep. 2020 Meanwhile, much of the Bay Area baked Monday during day two of a punishing heat wave that has seen daily records fall in several cities. Cynthia Dizikes, SFChronicle.com, "Power shut-offs to hit parts of Napa and Sonoma counties as PG&E braces for ominous winds," 8 Sep. 2020 This is not the start of another heat wave; cooler temperatures will occur this weekend. courant.com, "A break from the heat," 14 Aug. 2020 More than three-quarters of the United States is in the midst of a record-breaking heat wave. Theresa Machemer, Smithsonian Magazine, "How the U.S. Got Caught Under a ‘Heat Dome’," 13 July 2020 The fast-spreading blaze sent plumes of smoke into the sky as authorities urged people seeking relief from the Labor Day weekend heat wave to evacuate from areas in the Sierra National Forest. Fox News, "Creek Fire in California generates smoke clouds up to 50,000 feet, campers rescued," 6 Sep. 2020 The second day of the heat wave apparently will be as oppressive as the first. Gary Robbins, San Diego Union-Tribune, "The temperature is currently 100 or higher from San Diego to Borrego Springs," 6 Sep. 2020 With a spike in energy demand expected due to the heat wave, California’s power grid operator on Thursday issued a statewide Flex Alert calling for voluntary electricity conservation Saturday through Monday, from 3 p.m. to 9 p.m each day. Anna Buchmann, SFChronicle.com, "Bay Area temps could hit 113 over Labor Day weekend amid ‘dangerous’ heat wave," 3 Sep. 2020

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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Time Traveler for heat wave

Time Traveler

The first known use of heat wave was in 1893

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Statistics for heat wave

Last Updated

22 Sep 2020

Cite this Entry

“Heat wave.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heat%20wave. Accessed 29 Sep. 2020.

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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

Thesaurus: All synonyms and antonyms for heat wave

Britannica English: Translation of heat wave for Arabic Speakers

Britannica.com: Encyclopedia article about heat wave

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