Albertans across the whole province should brace themselves for extreme cold, while residents in some regions of British Columbia, Saskatchewan, and Yukon will prepare for the chills, Environment Canada warns. The federal agency’s latest public weather alerts on Monday morning warn of extremely cold wind chills early in the day, with the coldest values between -40 C (-40 F) and -55 C (-67 F). Some areas in northern Alberta will likely experience a prolonged period of extreme cold conditions, which could last into next weekend. Environment Canada issues extreme cold warnings when very cold temperatures or wind chill creates “an elevated risk to health,” such as frost bite and hypothermia. “Cover up. Frostbite can develop within minutes on exposed skin, especially with wind chill,” the federal agency said. “If it’s too cold for you to stay outside, it’s too cold for your pet to stay outside.” Extreme cold is expected …