The wind chills as low as 15 degrees are expected for parts of Alabama, Georgia and Florida Thursday evening into Friday morning.

The National Weather Service (NWS) said in one of its Thursday statements, "Black ice is difficult to see and distinguish from dry surfaces. The deceptive nature of black ice can catch you unaware while you are driving or walking, causing you to lose control of your motor vehicle or to slip and fall."

Snow totals in Louisiana have broken records. Parts of Florida, Texas and Georgia have also accumulated several inches of snow.

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.

Officials warned residents across the South that the effects of a major winter storm were not over, and that driving remained a hazard on roads frozen with slippery ice.

Snow and sleet started falling in Texas as officials begin to close schools and airports. Snow and ice could bring major travel disruptions and power outages from Texas to Florida.

Winter storm warnings are in place in several states with heavy snow, freezing rain and dangerously cold temperatures expected.

Vigilance and preparation are important, say forecasters at the NWS, as wintry weather brings hazardous travel conditions.

A sprawling winter storm that is pushing slowly across the United States will bring a risk of severe weather and excessive rainfall to a large part of the south-central United States from Wednesday into Friday. Isolated thunderstorms, flooding rains and damaging winds are all possible in an area between East Texas and western Kentucky.

Last week's historic Gulf Coast snowstorm helped lock down a rarity in the U.S. as all 50 states have already seen accumulating snow this winter − and all 50 had some at the same time. The power of the storm also created another rarity: Some Southern cities have seen more snow than their Northern brethren.

Southern California is expected to be slammed with up to hurricane-strength gusts that could spark a growth in various wildfires through Tuesday morning, officials said.

Millions of Americans are under weather warnings or advisories today as the U.S. braces for a new winter storm this week. A freeze warning is in place for several California counties, according to the National Weather Service (NWS).