Albertans across the entire province should brace themselves for extreme cold, while residents in some regions of British Columbia, Saskatchewan, and Yukon should prepare for similarly cold weather, Environment Canada warns. The federal agency’s latest public weather alerts on Monday morning warned of extreme cold early in the day, with the coldest values between -40 C  and -55 C. 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 factors create “an elevated risk to health,” such as frostbite and hypothermia. “Cover up. Frostbite can develop within minutes on exposed skin, especially with wind chill,” the federal agency said, adding that “if it’s too cold for you to stay outside, it’s too cold for your pet to stay outside.” Extreme cold is expected in many parts …