Ontario and Quebec hit by Arctic blast
Frigid temperatures and snow have expanded into Ontario and Quebec as a wave of cold air moves east.
Snow has begun falling in the north of Ontario, and freezing rain is forecast in parts of Quebec.
The sharply cooler temperatures are a result of frigid air pushed in by a powerful storm that hit Alaska with hurricane-force winds.
Some areas of the US and Canada have seen temperatures fall by as much as 22C (40F) in days.
Almost three feet (92cm) of snow fell in Michigan's upper peninsula on Monday and Tuesday, while up to 18in fell in northern Wisconsin, and parts of central Minnesota saw more than 16in
The cold air is expected to sharply cool off eastern Canada and the eastern US later in the week, repeating the quick change felt across North America.
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Toronto could see some snow on Thursday, after highs of 17C on Tuesday.
Wintry weather has stopped further west in Canada, but cities like Edmonton and Calgary continued to feel the chill, expecting high temperatures of -14C.
High winds and blowing snow on Wednesday caused several accidents in Winnipeg, the CBC reported.
Snow from the weather system has also been blamed for accidents that killed two in Minnesota.