A huge blizzard bearing down on the US east coast is expected to dump near-record levels of snow on Washington and the Mid-Atlantic region.
More than 50 million people have been warned of a "potentially paralyzing storm" late on Friday that will bring 24 inches of snow within hours.
There are warnings the blizzard could cause power outages and will bring road and air travel to a halt.
A rush for supplies led to long queues and empty shelves at supermarkets.
The weather system has already proved to be deadly, with two drivers killed in North Carolina, one in Tennessee and a pedestrian dead in Maryland.