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.

Flight cancellations and delays are stacking up as a major winter storm makes its way across the East Coast. As of shortly after 10 a.m. EST, there were 1,525 flight cancellations and 1,931 flight