Environment Canada has issued an Extreme Cold Warning for Perth County.
The advisory is in place for Friday night through Saturday morning.
The weather agency says extreme cold puts everyone at risk.
Risks are greater for young children, older adults, people with chronic illnesses, people working or exercising outdoors, and those without proper shelter.
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.
Extreme cold warnings are issued when very cold temperatures or wind chill creates an elevated risk to health such as frost bite and hypothermia.
