Back-to-back heat waves bake the central and eastern US

More than 25 million people in over a dozen states are under heat alerts Saturday. From the northern Plains to the Southeast, temperatures will be in the upper 90s, with heat index levels well into the triple digits.More than 25 million people in over a dozen states are under heat alerts Saturday. From the northern Plains to the Southeast, temperatures will be in the upper 90s, with heat index levels well into the triple digits.