A historic winter storm is subjecting roughly 60% of the U.S. population to a winter weather advisory or warning Friday, leading to thousands of canceled flights, warming shelters at capacity, and blizzard conditions on the eve of Christmas weekend.
The immense frigid blast is creating hazards from the U.S.-Canadian border to the Gulf Coast, and spans the Pacific Northwest to the East Coast. The National Weather Service estimated more than 200 million people were under some form of winter weather advisory or warning in "one of the greatest extents of winter weather warnings and advisories ever."
