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.

A rare frigid storm is charging through Texas and the northern Gulf Coast, blanketing New Orleans and Houston with snow, closing highways and grounding nearly all flights.

A rare winter storm charging through Texas and the northern Gulf Coast on Tuesday has closed highways and airports and prompted the first blizzard warning for

All Houston airports will reopen Wednesday after shutting down on Jan. 21 as a winter storm barreled through South Texas.