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

I’ve been convinced that we are about to experience a very serious and dangerous weather episode,” Houston Mayor John Whitmire said Sunday.

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

Follow NBC News live updates for the latest coverage of the freezing winter weather affecting large swaths of the U.S., from the Midwest to the South.

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.

The Montana and Wyoming mountains will see the heaviest snow, with up to 2 feet expected until 6 p.m. local time on Sunday.

It’s been a somewhat mild winter so far, but things have certainly changed as winter weather makes its presence known across the Lower 48 states ... The National Weather Service said ...

Memphis is set to get hit with a cold weather system early this week that could drop wind chills to as low as 5 degrees.

Florida Gov. Ron DeSantis has declared a state of emergency for the state of Florida ahead of a major winter storm sweeping across the southeast, which is expected to bring frigid temperatures to parts of Florida,

More than 220 million people across the United States are facing dangerous ... climatologist Jay Grymes said Monday. A National Weather Service forecast warned, “this should be considered ...

Delivery times for post in over half the country could be impacted due to hazardous weather, the U.S. Postal Service said.

A polar vortex is slated to sweep most of the continental US bringing winter storm warnings and a hazardous freeze to millions.