Parts of Georgia and Carolinas are digging out from a winter storm on Saturday after it produced heavy snow, freezing rain and ice across the region, knocking out power to hundreds of thousands of customers.

ATLANTA — An impactful winter storm has already brought accumulating snow for many, and a wintry mix of precipitation. Some freezing drizzle lingers overnight. A Winter Storm Warning is in effect for metro Atlanta and much of north Georgia, shown in pink, until 7 a.m. Saturday.

Thousands of flights have been canceled, including more than 400 out of Atlanta’s Hartsfield-Jackson airport – the nation’s busiest airport – where a ground delay has been issued.

After a freezing winter storm shut schools, cut power and cancelled or delayed flights, the South was slowly thawing Sunday as warmer weather melted snow and ice. Crews worked furiously and by Sunday morning power had been restored to parts of North Carolina and South Carolina where tens of thousands of customers lost electricity over the last few days,

The storm was moving out to sea off the East Coast on Saturday, leaving behind a forecast for snow showers in the Appalachian Mountains and New England. But temperatures were expected to plunge after sundown in the South,