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

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.

Heat and humidity are stretching east from the Mississippi River valley, with heat indices topping 110F in some areas