High UV index this Saturday across 16 U.S. states
NEW YORK, Friday, June 6, 2025, 9:15 AM (ET) — Residents across 16 states in the South and Southwest are facing extreme ultraviolet (UV) radiation levels this Saturday, June 7, according to the Environmental Protection Agency (EPA). UV indices of 11 or higher are forecasted at solar noon, when the sun is at its peak in the sky. These values fall into the “extreme” risk category, posing a serious threat to unprotected skin.
What areas are at highest risk
The EPA UV forecast map shows the highest exposure risks centered over the Southern Plains and much of the Southeast and Southwest, including:
California, Nevada, Utah, Colorado, Arizona, New Mexico, Texas, Oklahoma, Arkansas, Mississippi, Louisiana, Alabama, Tennessee, Florida, Georgia, and South Carolina.
These areas are projected to reach UV index levels of 11+, which means unprotected skin can suffer burns in under 10 minutes.
UV index scale and health risks
The UV Index is a scale from 1 to 11+, measuring the sunburn potential of ultraviolet radiation. Here’s how risk levels escalate:
1–2: Low – minimal danger, but sunglasses and SPF 30+ still recommended.
3–5: Moderate – cover up and avoid direct sunlight around midday.
6–7: High – protection is a must, especially between 10 a.m. and 4 p.m..
8–10: Very high – limit outdoor exposure, wear broad-brimmed hats and long sleeves.
11+: Extreme – avoid sun completely during peak hours, use SPF 30+, reapply every 2 hours, and stay in the shade.
Expert commentary on rising UV exposure
Alex DaSilva, AccuWeather meteorologist, warns that “UV levels will continue to rise as we head deeper into summer.” He emphasizes the importance of staying hydrated and avoiding the sun during peak heat hours.
Anthony Young, professor emeritus at King’s College London, underscores that “the higher the UVI, the shorter the time you need in the sun to burn.”
Richard Weller, professor of medical dermatology at the University of Edinburgh, adds that “sunlight exposure accelerates skin aging” and that “sunburn is a major risk factor for melanoma,” the deadliest form of skin cancer.
When and where UV levels will peak
The most dangerous period on Saturday, June 7, will occur around solar noon — roughly 12:30 PM local time in most of the affected regions. This timeframe overlaps with the period between 10:00 AM and 4:00 PM, during which UV intensity is strongest.
Even white surfaces like sand, or reflective materials like water and glass, can intensify UV exposure. Health officials continue to monitor and update forecasts daily, using National Weather Service (NWS) data.
