Millions of Americans from the Plains to the East Coast faced the threat of blizzards, heavy snow, treacherous ice and freezing rain through Monday, the National Weather Service said on Saturday. Governors in Kentucky and Virginia declared states of emergency ahead of the winter storm.

The developing storm system is forecast to bring heavy snow, crippling ice and severe weather across the country through the next three days.

A widespread winter storm has prompted blizzard and winter storm warnings across numerous states from the Plains to the mid-Atlantic.