Dangerous heat spreading to the East Coast by the weekend

Hot and very humid conditions will push the heat index to well over 100 degrees across a large portion of the central U.S. this week, according to the National Weather Service.

Excessive Heat Warnings and Heat Advisories are in effect for much of the Plains, Miss. Valley, Midwest and southern states. The heat will spread eastward by this weekend. Be very cautious if you must do outdoor activities here during the afternoon and evening.