After a freezing winter storm shut schools, cut power, and canceled or delayed flights, the South was slowly thawing Sunday as warmer weather melted snow and ice.

Crews worked furiously and power had been restored by Sunday morning to parts of North Carolina and South Carolina, where tens of thousands of customers lost electricity over the past few days, according to Duke Energy.

In Atlanta, around 1,000 flights were canceled or delayed Saturday. But just seven flights were canceled Sunday, with about 600 delayed.

Airport officials said Sunday morning that all roadways and parking lots had been cleared of snow and all runways were operational.

“Crews have not slowed down, in fact, we have brought in additional resources to help us get across the finish line,” read a news release on The City of Atlanta Government’s Facebook page. According to the post, power had been restored to 97% of Georgia Power customers by Sunday.

Much of the winter weather has moved out of the area, said Dylan Lusk, a National Weather Service meteorologist in Peachtree, Georgia.

“For the most part, we are slowly warming up and finally thawing a little bit after snowfall and a coating of freezing rain,” Lusk said.

Last week, the storm brought heavy snow — as much as 7 inches in some spots — and made roads slick across much of Texas and Oklahoma before moving east.

The National Weather Service says other parts of the country — including in the Great Lakes region — may see snow and brace for a mass of cold, dry air from the Arctic region.