Sweltering heat gripped swaths of the U.S. as forecasters predicted the potential for record-breaking temperatures in the Pacific Northwest and as cooling stations were set up for residents to find some relief in cities across the nation.

More than 145 million Americans on Thursday lived in areas under excessive-heat advisories from the National Weather Service. Warnings spanned the Pacific Northwest, the Northeast and parts of Missouri and Illinois while advisories blanketed parts of the Northeast, Midwest and South. Over one million residents were in areas under various fire-weather advisories, which indicate hot, dry and windy conditions that could quickly spread wildfires, according to the National Weather Service.

It said triple-digit temperatures in the Pacific Northwest could break daily heat records late this week.


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