Much of the U.S. is under extreme heat warnings or advisories while New York, Philadelphia and Washington could feel like 100 degrees or more.

Much of the U.S. is under extreme heat warnings or advisories while New York, Philadelphia and Washington could feel like 100 degrees or more.

A punishing heat wave will bring hot temperatures to eastern US and linger for several days, underscoring how climate change heats things up.

The weather service said several major metropolitan areas in the Southeast were expected to face an extreme heat risk for several days.