An unsafe UV level is typically a UV index of 6 or higher, indicating high to very high UV radiation that can cause significant skin damage and increase the risk of skin cancer. At a UV index of 6 to 7, precautions like wearing protective clothing, using sunscreen with an SPF of 30 or higher, and seeking shade during midday hours are essential. When the UV index reaches 8 to 10, UV radiation is very high, and extra protection is necessary to prevent sunburn and long-term skin damage.

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The health effects of UV radiation include melanoma and nonmelanoma skin cancer, premature aging of the skin, cataracts and other eye damage, and immune suppression. In the summer months, stronger UV rays blanket much of the US with the greatest concentration over southern states, which may have the greatest occurrences of sun exposure-related problems. Even Canada experiences significant exposure during this time.

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Most of the sun exposure in a person’s life happens before they are 25 years old. It is important to have good sun protection habits from the start. UV radiation from the sun and tanning beds can cause significant skin damage, leading to premature aging, sunburns, and an increased risk of skin cancer, including melanoma, which is particularly aggressive and common among younger people.

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It’s encouraged that all adults get a skin check once a year. Unlike screenings such as mammograms and colonoscopies, there is no universal protocol about when to start so try to apply common sense. If you are fair-skinned with red or blond hair, you are at higher risk for UV damage and might want to see a dermatologist in your late teens or early 20s.

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Protecting your skin care is a lifelong effort. Therefore, damage to the skin due to sun exposure and cancer risk are both cumulative—the progressive effects of UV exposure over many years. The experts at Providence Saint John’s Health Center and Saint John’s Cancer Institute have weighed in on the matter and provided the following guidance that everyone should follow to protect their skin.

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Tanning beds emit UV radiation that is as harmful as, or even more harmful than, natural sunlight. They significantly increase the risk of skin cancer and should be avoided.

Through a multidisciplinary team approach, the Center for Melanoma, Skin and Soft Tissue Tumors at Saint John’s Cancer Institute provides individualized and compassionate care that is well supported by clinical experts and researchers working together to develop patient-specific treatment plans. The goal is to restore wellness by applying innovative methods and best-practice models that demonstrate improved outcomes for patients. We are a comprehensive melanoma oncology provider with immediate access to scientific research programs.

Thanks to its innovation capability and R&D investments, Essilor invented the first progressive lens, Varilux® lenses, the market reference today. Essilor also created Crizal®, a lens coating that combines protection from reflections, scratches, smudge, dust, water, UV rays and blue-violet light. For Essilor, real innovation brings direct benefits to people.

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When the UV Index is at its highest, such as between June and September for the US, the sun’s rays are at their greatest intensity, which causes the skin to burn in less time. For those with lighter skin, lighter eyes, and even reddish hair, the danger is elevated. Repeatedly burning the skin increases one’s chances of getting melanoma—a very common type of skin cancer. According to the World Health Organization, 1 in 3 cancers diagnosed is skin cancer, while 1 in 5 Americans will develop skin cancer in their lifetime.

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A productive sunscreen is helpful only if it is reapplied throughout the long summer days while covering your skin or seeking shade, and avoiding the sun altogether are the best solutions overall. Beyond the pain that comes with an uncomfortable and unforgiving sunburn, protecting your skin from the harsh summer sun is important to avoid more dangerous and long-lasting consequences.

You should wear sunscreen whenever the UV index is 3 or higher. At this level, UV radiation is strong enough to damage your skin and increase your risk of skin cancer. As the UV index rises, especially to high levels of 6-7 and very high levels of 8-10, applying sunscreen becomes even more critical. When the UV index reaches its highest levels of 11 and above, the radiation is extreme, and sun protection is paramount. In addition to sunscreen with an SPF of 30 or higher, wear protective clothing, hats, and sunglasses, and seek shade during peak sun hours. Even on cloudy days, UV radiation can penetrate through clouds, so it’s important to stay vigilant. Regularly checking the UV index helps you take proactive steps to protect your skin, reducing the risk of sunburn and long-term skin damage. Always prioritize sun protection to maintain healthy skin and lower your risk of skin cancer.

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Created in 1972, Essilor is a world leader in corrective lenses. Its international presence and ability to meet local specificities enables the brand to adapt to the needs of consumers across the world. Recognized by vision health professionals, Essilor’s products aim to bring comfort and protection to spectacle wearers.

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Transitioning from moderate to high levels, the UV index ranges from 8 to 10, indicating very high UV radiation that necessitates extra precautions such as wearing protective clothing, applying broad-spectrum sunscreen with SPF 30 or higher, and seeking shade during peak sun hours. At an extreme UV index of 11 or higher, even a few minutes of sun exposure can result in sunburn, making it critical to take protective measures seriously. Always monitor the UV index in your area to safeguard your skin and reduce the risk of skin cancer.

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The UV Index chart below shows where ultraviolet radiation is the strongest in June for the US. When the UV index is extreme, 10 and higher, skin can burn in just 10 minutes or less.

Saint John’s Cancer Institute is a cancer research institute dedicated to the understanding and curing of cancer in order to eliminate patient suffering worldwide.

Regularly check the UV index to know when UV radiation levels are high. A UV index of 3 or higher means you should take sun protection measures.

The highest UV index possible is 11 or greater, which indicates extreme levels of UV radiation. This extreme UV index level is most commonly seen in tropical regions near the equator and at high altitudes where the atmosphere is thinner. UV radiation at this level can cause severe skin damage in a short period, increasing the risk of skin cancer significantly.