More than 220 million people across the United States are facing dangerous cold that will also open the door for a potentially historic and crippling winter storm that could deliver snow as far south as Florida and the Gulf of Mexico.

Temperatures will begin to fall quickly as the Arctic cold front moves through Central Florida. Temperatures in the 70s Sunday will fall into the 30s and 40s by Monday morning. The active and cold stretch of weather looks to continue for much of the week ahead.

Millions across the Gulf Coast states are bracing for a rare winter storm moving along the northern Gulf of Mexico, which will spread dangerous snow and ice along 1,000 miles of Interstate 10 from Texas to Florida and Georgia,