Eko Hot Blog reports that Large parts of both countries are under winter weather alerts that stretch from coast-to-coast and as far south as the US-Mexico border.
The storm has brought damaging winds and freezing temperatures that can quickly lead to frostbite.
At least six storm-related deaths have been reported in the US.
Major airports have cancelled thousands of flights as the storm intensifies.
As of Friday morning, more than 1,400,000 people from Texas to Maine had no electricity as intense winds damaged power lines.
Power outages have also been reported in Canada, affecting 317,900 people in the provinces of Quebec and Ontario.
The US National Weather Service said that over 200 million people – or roughly 60% of the US population – are under some form of winter weather advisory.
Much of Canada, from British Columbia to Newfoundland, is also under extreme cold and winter storm warnings. Several school boards in Ontario, including Toronto, have cancelled classes.
This storm is set to bring the iciest Christmas in decades, say forecasters.
The National Weather Service (NWS) said temperatures of -50F (-45C) and even -70F were possible.
In the US, the bad weather has been linked to several deaths. Three fatal car crashes have been reported in the state of Kansas due to poor road conditions.
At least three others have died in Kentucky, Governor Andy Beshear said on Friday – two were killed in car accidents and another person described as “housing insecure” has died.
In Fort Worth, Texas, a man who was thought to be homeless died after being found outside in the bitter cold.
The Arctic air mass is projected to bring strong wind gusts and temperature of 15F (-9.4C) to El Paso, Texas, where newly arrived undocumented migrants are sleeping rough on city streets.
Source: BBC
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