An infamous heat dome in 2021 led to triple-digit temperatures in the Pacific Northwest for 27 days, causing numerous deaths and prompting research studies.
The term 'heat dome' refers to a ridge of high pressure that lingers over a broad area, trapping warm air below, as defined by the American Meteorological Society.
Heat domes, as explained by climatologist Abatzoglou, are distinct from heat waves due to their size, persistence, and tendency to occur over land and warm seasons.
Heat domes synchronize hot and dry conditions over large geographical regions, contributing to the severity of heat-related hazards.
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