An extreme cold warning has been issued for the Bancroft area.
Environment Canada says wind chill values could be between minus 35 to minus 40 degrees this morning.
Wind chill values for this afternoon will be steady around minus 30 degrees, and tonight could see temperatures fall to minus 25; minus 30 with the wind chill.
They warn to cover up as frostbite could develop within minutes on exposed skin.
This risk is especially great for young children, older adults, people with chronic illnesses, people working or exercising outdoors, and those without proper shelter.