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.
As the planet sees longer and more intense heat waves with global warming, primarily caused by humans burning fossil fuels, Mainzer says solar combined with batteries, both of which perform well in the heat, will be important to keep the lights on. Julia Simon, NPR, 8 Oct. 2025 Large marine heat waves have occurred in the Pacific during each of the last six years—five of them were the largest heat waves on record for the eastern North Pacific since monitoring began in 1982. Simmone Shah, Time, 8 Oct. 2025 And record-breaking heat waves are reshaping our way of life. Abc Climate Unit, ABC News, 7 Oct. 2025 This late-season heat wave will produce moderate to major heat risk across parts of the Dakotas, Minnesota, Iowa, western Wisconsin, and into northern Illinois, the National Weather Service warned. Doyle Rice, USA Today, 4 Oct. 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

Browse Nearby Words

Cite this Entry

“Heat wave.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heat%20wave. Accessed 18 Oct. 2025.

Kids Definition

heat wave

noun
: a period of unusually hot weather

More from Merriam-Webster on heat wave

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!