Observatoire des droits humains (anglais seulement)

What is a heat dome? An atmospheric scientist explains the weather phenomenon baking large parts of the country

(Version anglaise seulement)

par William Gallus, Professor of Atmospheric Science, Iowa State University

A heat dome occurs when a persistent region of high pressure traps heat over an area. The heat dome can stretch over several states and linger for days to weeks, leaving the people, crops and animals below to suffer through stagnant, hot air that can feel like an oven.

Typically, heat domes are tied to the behavior of the jet stream, a band of fast winds high in the atmosphere that generally runs west to east.

Normally, the jet stream has a wavelike…

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