Environment Canada's UV Index is a measure of the intensity of the sun's burning UV rays. The higher the number, the stronger the sun's rays. 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. UV Index forecasts are widely available between April and September.  Your sources include local TV and radio stations and the Environment Canada web site.  Recommended Sun Protective Actions Low - UV Index 1-2 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. Moderate - UV Index 3-5 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. High - UV Index 6-7 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. Very High - UV Index 8-10 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. Extreme - UV Index 11+ 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.