The rare deep freeze in the wake of an historic winter storm that swept across the U.S. South this week will linger through Sunday, leaving the region in the grip of extreme cold and ice and creating dangerous driving conditions.

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:

A major storm spread heavy snow, sleet and freezing rain across the southern United States on Wednesday, breaking snow records and treating the region to