California's deadly wildfires could come to an end in the coming days when a weekend storm douses historically dry terrain, but the storm will come with the potential for a different problem: flash floods.

The snow storm could hit over a dozen states through Wednesday, including Texas, Louisiana, Mississippi, Alabama, Florida, Georgia and the Carolinas.

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