The extreme weather is being caused by the polar vortex, an area of cold air that circulates around the Arctic.

Kentucky, Virginia, West Virginia, Kansas, Arkansas, and Missouri have declared states of emergency as the storm brings dangerous travel conditions.

As a deep winter chill begins to take over the northern half of the country, blizzard warnings were issued in three states while a new major winter storm moves across the nation. Around 60 million Americans from the Dakotas to Delaware were under winter weather alerts as of Sunday morning,