Frigid temperatures engulfed the South on Monday ahead of a winter storm that's expected to spread heavy snow and disruptive ice around a region from Texas to north Florida that rarely sees such weather,

Precip may start as rain, but as temps fall to the freezing mark after sunset Monday, a transition to freezing rain and sleet is expected.

Around 40 million people in the U.S. are under a winter storm warning from an unusual blast of severe winter weather.