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 frigid storm charged through Texas and the northern Gulf Coast on Tuesday, blanketing New Orleans and Houston with snow that closed highways, grounded nearly all flights and canceled school for more than a million students more accustomed to hurricane dismissals than snow days.

A winter storm dumped snow across the Deep South Tuesday, leaving areas that rarely see this kind of weather with dangerous travel conditions, widespread airport closures and snow days. Here’s what it looked like from Texas across Louisiana,