Dangerous below-freezing temperatures with even colder wind chills were also expected to last over much of the week in the region. Authorities say three people have died in the cold weather.

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 southeast Texas and southwest Louisiana.

Snow and ice had ground road travel to a halt in some places and at least two people died in Texas. Many school districts had closed throughout a region unaccustomed to snow.