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.
When a heat wave strikes or a cold snap sets in, a basement stays relatively comfortable compared to an upstairs room. Hanna Wickes, Charlotte Observer, 27 Feb. 2026 The reactions over this week’s snowball fight were similar to those that followed a 2019 episode during a heat wave, when boisterous young people engaged in water fights were recorded on video tossing water at police officers. Anthony Izaguirre, Fortune, 26 Feb. 2026 Some ComEd customers saw a triple-digit increase in their total June electricity bills due to a supply rate increase and high demand during a summer heat wave. Robert Channick, Chicago Tribune, 25 Feb. 2026 Nothing else any government has ever proposed to do would add as much fuel to global warming and to the increasingly destructive heat waves, hurricanes, droughts, crop failures, wildfires and floods that are among its most obvious immediate effects. Orlando Sentinel, The Orlando Sentinel, 23 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 5 Mar. 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