After a freezing winter storm shut schools, cut power and cancelled or delayed flights, the South is slowly thawing as warmer weather melts snow and ice.

Twenty states, from Texas to Delaware, were on alert Friday for snow and ice as the storm continued to move across the South.

Flight cancellations piled up and officials warned of continuing dangerous roads Saturday in the wake of a winter storm that brought biting cold and wet snow to the U.S. South, leading to school closures and disrupting travel.

A winter storm that dropped heavy snow and glazed roads throughout the U.S. South was maintaining its icy grip on much of the region into the weekend.