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.

Atlanta is bracing for freezing conditions and icy roads as temperatures drop and wintry weather continues to affect the region. Here’s a simplified breakdown of what you need to know:

Storm Cora has paralyzed the South, bringing historic snowfall to Nashville and Memphis, rare snow to Charlotte, North Carolina, and record-breaking icy conditions to parts of Kentucky, Texas and Georgia,