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
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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.
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Simmone Shah, Time, 30 Jan. 2026
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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 10 Feb. 2026.
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