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
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.
That includes deadly floods, extreme heat waves, catastrophic wildfires and other natural disasters in the United States and around the world. Matthew Daly, Chicago Tribune, 12 Feb. 2026 The town of Esquel, near Los Alerces National Park, logged 11 consecutive days of maximum temperatures in January, its second-longest heat wave in 65 years. Isabel Debre, Los Angeles Times, 11 Feb. 2026 It is used to justify regulations, such as auto emissions standards, intended to protect against threats made increasingly severe by climate change — deadly floods, extreme heat waves, catastrophic wildfires and other natural disasters in the United States and around the world. Matthew Daly, Fortune, 10 Feb. 2026 Before that micro heat wave arrives, Central Texas will briefly feel the effects of the most recent cold front on Wednesday and Thursday morning. Mary Wasson, Austin American Statesman, 4 Feb. 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 17 Feb. 2026.

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!

More from Merriam-Webster