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By Joe Edwards
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Fifteen states will experience elevated ultraviolet (UV) radiation levels this weekend, according to the National Weather Service (NWS) and the Environmental Protection Agency (EPA).
Why It Matters
The EPA said that elevated UV radiation levels greatly increase the risk of skin burns, eye damage and long-term health problems like skin cancer.
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What To Know
The UV index runs on a scale of one to 11. The levels, and their corresponding advice, are:
1-2: Low (minimal risk from UV rays for the average person)
- Wear sunglasses on bright days.
- In winter, snow can reflect UV and nearly double exposure.
- Use SPF 30+ sunscreen if you burn easily.
3-5: Moderate (moderate risk of harm from unprotected sun exposure)
- Cover up, wear a hat and sunglasses.
- Use SPF 30+ sunscreen.
- Stay in the shade near midday when the sun is strongest.
6-7: High (high risk of harm from unprotected sun exposure)
- Limit sun time between 10 a.m. and 4 p.m.
- Wear protective clothing, sunglasses, and SPF 30+ sunscreen.
8-10: Very High (very high risk of harm; sun protection is essential)
- Take extra precautions including wide-brimmed hats and long sleeves.
- Minimize exposure between 10 a.m. and 4 p.m.
- Be aware: white sand and similar surfaces reflect UV and increase exposure.
11+: Extreme (extreme risk of harm; unprotected skin can burn in minutes)
- Avoid sun exposure from 10 a.m. to 4 p.m.
- Reapply SPF 30+ sunscreen every 2 hours.
- Seek shade, wear full coverage, and use sun protection.
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According to the EPA's UV index forecast for Saturday, solar noon—when the sun is at its highest point in the sky at a specific location—parts of Nevada, California, Arizona, Utah, New Mexico, Colorado, Texas, Oklahoma, Arkansas, Louisiana, Missouri, Kansas and Wyoming could see levels of at least 11.
On Sunday, Florida and Mississippi were expected to see similar UV levels in addition to the other states, while Nebraska and Missouri will experience UV levels below 11.
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What People Are Saying
Anthony Young, emeritus professor of experimental photobiology, dermatology, at King's College, London, previously told Newsweek: "The UV index [UVI] is a measure of the sunburning power of sunlight....The higher the UVI, the shorter the time you need in the sun to burn."
Richard Weller, professor of medical dermatology, at the U.K.'s University of Edinburgh, previously told Newsweek that sunlight can cause photoaging—premature aging of the skin as a result of prolonged and repeated exposure to UV radiation, adding: "Sunburn is a risk factor for melanoma skin cancer, which is the most serious of the skin cancers."
What Happens Next
The UV index forecast map is generated each day using data from the NWS.
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