Environment Canada has issued such warnings for most of Ontario and Atlantic Canada.
Many people in the Atlantic provinces will also have to contend with a blizzard today in addition to windchills that are forecast to dip to as low as -35C.
A cold air mass settled in early this week but many people may see some relief from the cold starting this weekend.
Environment Canada's forecast high for Gananoque, Ont. on Sunday is -2C, while Moncton, N.B. is expected to get a mix of rain and snow on Monday with a high of plus 6.
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