Airports are readying for major disruptions in Texas, Louisiana and along the Gulf Coast before anticipated wintry blast.

Millions of people living along the Gulf Coast and into the Southeast are bracing for a rare, significant winter storm that’s expected to significantly impact travel and lead to power outages due to heavy snow and ice starting Monday evening.

More than 30 million people across the South are under winter weather advisories as they brace for Winter Storm Enzo to bring a mix of snow, ice and freezing rain to states and cities that rarely have to deal with these dangerous weather conditions.