Millions of Americans are bracing for the first widespread freeze of the season this weekend.
Frost and freeze alerts were issued from eastern Oklahoma to the coastal Carolinas, covering cities including Tulsa, Oklahoma, Little Rock, Arkansas, Birmingham, Alabama, Atlanta, Georgia and Raleigh, North Carolina. The first below-freezing temperatures of the season are expected to bring sharp cold air, with wind chills dropping in Chicago, New York, Atlanta and even Florida.