The late July heat wave covering the eastern U.S. could affect as many as 190 million people, according to the National Weather Service.
Government forecasters predict people living in the lower Mississippi and Ohio valleys, and then over and along most of the Eastern Seaboard, will be dealing with dangerously hot weather through Wednesday. Extreme heat warnings and heat advisories stretch across those areas.
There should be some relief toward the end of the week with the heat wave expected to weaken in the northern areas on Thursday, and then also weaken over the rest of the region through the weekend.
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