Cold Weather Alerts and Wind Chill
Peel Public Health may issue a cold alert when the weather suggests a risk to human health.
Wind chill is a term used to describe the cooling effect caused by the combined effect of temperature and wind. When the temperature is -10 °C and the wind chill is -20, you will feel as cold as you would on a calm day when the temperature is -20 °C.
The wind makes you feel colder by evaporating any moisture on your skin - a process that draws more heat away from your body.
Listen for Environment Canada's weather forecasts and wind chill warnings. In most of southern Canada, a wind chill is included in the forecast when it reaches -25, the point where frostbite becomes a risk.
Environment Canada: Weather and Meteorology