A heat wave gripped large swaths of the Western U.S. on Saturday as temperatures hovered near record highs, heightening wildfire risks in areas that already are dry or burning and prompting warnings for people to stay inside.
A ridge of high pressure is holding heat close to the ground - what's known as a heat dome - from Arizona to Montana, though the good news is that it will be relatively short-lived, National Weather Service meteorologists said.
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