<P> Stay in shade near midday when the sun is strongest . If outdoors, wear sun protective clothing, a wide - brimmed hat, and UV - blocking sunglasses . Generously apply broad spectrum SPF 30 + sunscreen every 2 hours, even on cloudy days, and after swimming or sweating . Bright surfaces, such as sand, water and snow, will increase UV exposure . </P> <Tr> <Td> 6.0--7.9 </Td> <Td> Orange </Td> <Td> "High" </Td> <Td> A UV Index reading of 6 to 7 means high risk of harm from unprotected sun exposure . Protection against skin and eye damage is needed . <P> Reduce time in the sun between 10 a.m. and 4 p.m. If outdoors, seek shade and wear sun protective clothing, a wide - brimmed hat, and UV - blocking sunglasses . Generously apply broad spectrum SPF 30 + sunscreen every 2 hours, even on cloudy days, and after swimming or sweating . Bright surfaces, such sand, water and snow, will increase UV exposure . </P> </Td> </Tr> <P> Reduce time in the sun between 10 a.m. and 4 p.m. If outdoors, seek shade and wear sun protective clothing, a wide - brimmed hat, and UV - blocking sunglasses . Generously apply broad spectrum SPF 30 + sunscreen every 2 hours, even on cloudy days, and after swimming or sweating . Bright surfaces, such sand, water and snow, will increase UV exposure . </P> <Tr> <Td> 8.0--10.9 </Td> <Td> Red </Td> <Td> "Very high" </Td> <Td> A UV Index reading of 8 to 10 means very high risk of harm from unprotected sun exposure . Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly . <P> Minimize sun exposure between 10 a.m. and 4 p.m. If outdoors, seek shade and wear sun protective clothing, a wide - brimmed hat, and UV - blocking sunglasses . Generously apply broad spectrum SPF 30 + sunscreen every 2 hours, even on cloudy days, and after swimming or sweating . Bright surfaces, such as sand, water and snow, will increase UV exposure . </P> </Td> </Tr>

Description of the uv index and its importance