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.
This advisory is in effect until 11 p.m. During heat waves, consider the following tips from the NWS Consume plenty of fluids to stay hydrated. Ca Weather Bot, Sacbee.com, 14 July 2025 In France, where adaptation has been slower, heat waves have caused thousands of deaths at least twice in this century. Cory Franklin, Chicago Tribune, 13 July 2025 If the recent heat waves have drawn your attention to a subpar home cooling setup, consider one of Dyson's air purifier-fan combos. Sara Coughlin, SELF, 11 July 2025 This pattern of frequent heat waves will become more common around the globe, according to the UCLA study. Los Angeles Times, 10 July 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 20 Jul. 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!