Canada’s wind chill index is based on the loss of heat from the face. It was developed using human volunteers, computer technology, and a better understanding of how skin loses heat. The index is expressed in temperature-like units which are easier for everyone to understand.
The best way to understand wind chill is to think of it as a feeling. The new wind chill index represents how your skin will feel at a given temperature in a calm day. For instance, if the outside air temperature is -5 degrees Celsius and the wind chill is -25, your face will feel as cold as it would at -25 degrees Celsius on a calm day.
What to do for wind chill:
|Wind Chill||Health Concern||What to do|
|0 to -9||Slight discomfort||Dress warmly|
|-10 to -24||Uncomfortable, bare skin feels cold, risk of hypothermia||Dress in layers, wear a hat, mitts & scarf, keep active|
|-25 to -44||Skin may freeze, Risk of hypothermia||Check face, fingers, toes, ears, & nose for numbness or whiteness, dress in layers, cover bare skin, wear a hat, mitts & scarf, keep active|
|-45 to -59||Bare skin may freeze in minutes||Check face, fingers, toes, ears, & nose for numbness or whiteness, dress in layers, cover bare skin, wear a hat, mitts & scarf, keep active|
|-60 and colder||Bare skin may freeze in less than 2 minutes||It is dangerous! Stay indoors|