A wave of arctic cold froze the U.S. Midwest as a wintry storm coated the South with ice and snow and contributed to almost 3,000 flight cancellations.

The storm was touched off by a new wave of polar air pushing deep into the eastern U.S., where it has kept temperatures below zero Fahrenheit from Minneapolis to Chicago, triggered winter storm warnings and advisories from Texas to New Jersey and created subzero wind chills from North Dakota to western New York.

Across the U.S., 2,933 flights were canceled as of Tuesday morning,
according to FlightAware, a Houston-based tracking service. Atlanta’s Hartsfield-Jackson International, Houston’s Bush Intercontinental and Chicago’s O’Hare International were among the hardest-hit airports. Seventy percent or more of the flights into and out of New Orleans were scrubbed, FlightAware said.

A Delta flight from Atlanta to Seattle was among those canceled Tuesday; get real-time flight information at
portseattle.org/Sea-Tac or check with airlines.

The storm is expected to stay south of the U.S. Northeast, where temperatures plummeted as the cold moved in.