Hot and very humid conditions will push the heat index to well over 100 degrees across a large portion of the central United States, 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.
On July 22 high temperatures are forecast to hit 100 degrees in Billings; 99 degrees in St. Louis; 101 degrees in Dallas and 111 degrees in Las Vegas.