Severe weather bringing everything from tornadoes and thunderstorms to blizzard conditions and snow is expected to stretch across the eastern US on Monday.
Over a dozen states were under a wind advisory on Monday morning, from Missouri to Maine, with tornado watches in place in parts of Florida, Alabama and Georgia.
As much as 2ft (.6m) of snow has fallen in Wisconsin and northern Michigan since the storm began this weekend, according to the National Weather Service.
The bulk of the storm is expected to exit off the east coast into the Atlantic by Tuesday, with continued abnormally cold weather in its wake.
Over 11 million people are under blizzard warnings, and another four million are under winter storm warnings, according to the BBC's media partner CBS News.
