Eight people have been killed in a massive blizzard bringing more than 2ft (60cm) of snow and punishing winds up the US East Coast.
Six states have declared states of emergency, and thousands of flights have been cancelled as a result of the storm.
More than 50 million people across more than a dozen states have been warned to stay at home as it moves north.
The nation’s capital, Washington, could lie under a record 30in (76cm) of snow by the time the storm passes on Sunday.
The weather system affects a huge swathe of the country, from Arkansas in the south to Massachusetts in the north-east.
Supermarkets ran out of food amid a rush for supplies before the first snowflakes fell on Friday.