More-tolerable conditions are on the way, but not close enough to avoid an extreme-cold warning.
Environment Canada extended the warning Wednesday morning, with wind-chill values between -40 and -45 C for the early part of the morning.
"Extreme cold puts everyone at risk," stated the warning.
"Watch for cold-related symptoms: shortness of breath, chest pain, muscle pain and weakness, numbness, and colour change in fingers and toes.
"Cover up. Frostbite can develop within minutes on exposed skin, especially with wind chill.
"If it's too cold for you to stay outside, it's too cold for your pet to stay outside."
Environment Canada said it will heat up this afternoon with "relatively warmer air" set to move into the southern prairies.
The afternoon's high is forecast to be -11 C, with the wind making it feel like -20 C.