Relief from frigid cold expected by Sunday

All of Alberta is under an extreme cold warning, with no relief from the frigid weather expected for almost a week, Environment Canada says.

Wind chill values of 45are expected Tuesday, with frigid temperatures forecast to persist throughout the week, Environment Canada said on its website.

The end to the cold snap is forecast to come on Sunday, when the temperature in Edmonton is expected to reach a high of 4C.

Until then, people are reminded that frostbite can develop within minutes on exposed skin, especially with wind chill.

"Extreme cold puts everyone at risk," the weather agency said. "If it's too cold for you to stay outside, it's too cold for your pet to stay outside."

Those who work outdoors should take regular breaks to warm up.

People should watch for cold-related symptoms: shortness of breath, chest pain, muscle pain and weakness, numbness and colour change in fingers and toes.