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Living > Public Health, Safety

Follow the UV Index

Environment Canada's UV Index is a measure of the intensity of the sun's Ultraviolet Radiation (UV). The higher the number, the stronger the UV. The scale runs from 1-11 in Canada but may reach 14 or higher in the southern United States and the tropics.

The daily UV Index forecast is a prediction of the maximum UV strength for the day. This peak is usually reached in the early afternoon (12-2 p.m.). UV Index forecasts are widely available via local television and radio stations between April and September.

Follow the recommended sun protective actions

1-2 (Low)
Minimal sun protection required for normal activity.  Wear sunglasses on bright days and cover up and use sunscreen if outside for more than one hour.

3-5 (Moderate)
Take precautions.  If outside for 30 minutes or more, cover up, wear a hat, sunglasses and sunscreen and look for shade near midday when the sun is strongest.

6-7 (High)
Protection required.  Reduce sun exposure between 11 a.m. and 4 p.m.  Take full precautions by covering up, wearing a hat, sunglasses and sunscreen.

 8-10 (Very High)
Extra precautions required.   Avoid the sun between 11 a.m. and 4 p.m.  Take full precautions by covering up, wearing a hat, sunglasses and sunscreen.  Unprotected skin will be damaged and can burn quickly.

11+ (Extreme)
Take full precautions.  Avoid the sun between 11 a.m. and 4 p.m.  Cover up; wear a hat, sunglasses and sunscreen.  Unprotected skin will be damaged and can burn in minutes.
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