A sweltering heat wave is bearing down on a large swath of the U.S., creating potentially dangerous conditions for millions of people in multiple states.
Meteorologists say the stifling temperatures could break daily record highs and last throughout the week in what the National Weather Service has described as the first major heat wave of the summer.
"The duration of this heat wave is notable and potentially the longest experienced in decades for some locations," the NWS said in a post on the social media platform X, formerly known as Twitter.
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