Frigid temperatures and arctic air have left most of the western provinces shivering with wind chills dipping down to -55C.
Environment Canada says all of Alberta and most of British Columbia and Saskatchewan, along with parts of Manitoba and Ontario are under extreme cold weather warnings.
It says the wind chill can range between -40C and -55C in Edmonton and Calgary.
It says arctic outflow winds and low temperatures have also been forecast for much of British Columbia with the mercury dipping to near or below -20C.
Environment Canada says cold, arctic air remains entrenched over western and central Saskatchewan with wind chills of up to -45C.
The agency says extreme cold could persist into next week.
The Canadian Press