As the weather is getting cold parts of US and Canada, temperatures are expected to fall below -20F (-29C), said the National Weather Service. In Canada, high winds have knocked out power for tens of thousands of residents in Nova Scotia.
Giant waves caused by the storm saw freezing floodwaters inundate parts of the New England coast.
According to reports, the extreme weather has already left 19 people dead in the US and two more in Canada.
Four deaths were reported due to traffic accidents in North and South Carolina. Further accidents occurred in Wisconsin, Kentucky and Texas.
In Philadelphia, a car was unable to stop at the bottom of a steep hill and was hit by a commuter train, killing a passenger in the vehicle.
In Virginia, a girl was fatally struck by a car while sliding, and a 75-year-old man was killed after being hit by a snow plow.
With the snowfall ending, temperatures are forecast to continue plummeting into the weekend as frigid air lingering over the North Pole prowls towards the US mid-Atlantic region.
The National Weather Service said on Friday: “An arctic outbreak will keep temperatures 20F to 30F degrees below average across the north-eastern US.
Experts say the so-called bomb cyclone storm drew moisture and strength from as far south as the Caribbean Sea.
More than 1,200 flights were canceled on Friday, a day after 4,000 others were grounded.
New Hampshire’s Mt Washington, which boasts of having the “world’s worst weather”, is expected to see a record low of -95F (70C) on Friday night. There are mass power shutdowns in Canada.
Atlantic and central Canada are being hit by the winter storm.
The provinces of New Brunswick and Newfoundland and Labrador are both under winter storm and blizzard warnings.
In the morning Jan. 5, Nova Scotia Power said some 125,000 customers were still without power after 140km/h (87mph) wind gusts hit parts of the maritime province.
Outages have also been also reported in New Brunswick and Newfoundland. Also, Ontario and Quebec were both under extreme cold warnings.
In Massachusetts, Boston received over 1ft (30cm) of snowfall.
Utility companies in eastern North America are advising residents to leave their homes and seek shelter elsewhere if they experience problems heating their properties.
The storm has so far forced hundreds of schools and businesses to close in New York City, Philadelphia, Boston, the Carolinas, Maryland and Virginia.
Panicked New York City residents rushed to shops before the snow came, clearing shelves of milk, eggs, and kale, the New York Times reported.
The weather pattern has already brought snow to the US South as far down as Florida, where the cold snap has caused iguanas to lose their grip and fall from trees.
Natural gas prices in the US northeast have risen, driven by demand for heating fuel.