heat dome
noun
plural heat domes
: a large weather pattern characterized by high atmospheric pressure that collects and holds an unusual amount of heat over a particular area
Examples of heat dome in a Sentence
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Extreme weather and resilience spending Utilities and regulators are responding to wildfire seasons, polar vortices, and heat domes by investing in resilience—undergrounding lines, advanced protection systems, expanded tree‑trimming, and passing the costs on to customers.
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Ashley Lutz, Fortune, 10 Feb. 2026
Across the globe in southern Australia, a heat dome is setting records, with temperatures reaching 120°F—the most severe heat wave the country has experienced in 16 years.
—Simmone Shah, Time, 30 Jan. 2026
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Ashley Lutz, Fortune, 10 Feb. 2026
Across the globe in southern Australia, a heat dome is setting records, with temperatures reaching 120°F—the most severe heat wave the country has experienced in 16 years.
—Simmone Shah, Time, 30 Jan. 2026
Cite this Entry
“Heat dome.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heat%20dome. Accessed 18 Feb. 2026.
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