SEATTLE — Residents of the western U.S. are sweltering in a heat wave that’s already hospitalized some as temperatures will continue to hit dangerous levels throughout the weekend in Washington, Oregon, Southern California, Nevada and Arizona.

Around 1.2 million people were under extreme heat risk Saturday, meaning temperatures are expected to stay dangerously high with no relief overnight. The largest area under the warning is around Tucson, Arizona, where the National Weather Service forecast dangerous highs between 102 and 107 degrees Fahrenheit. Areas of inland Southern California also faced extreme risk.

Another 18.6 million are under major heat risk, affecting workers and anyone without regular cooling and hydration, including in Miami.

Portland, Oregon, reported a record high f

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