Sun & UV
New York's UV Index is still hitting the high range this week even as kids head back to school, and the science behind the old 80-percent-by-18 sun exposure claim points the bigger risk at the parents dropping them off. Here is what the only study to actually measure cumulative UV dose by age found instead.
5 min read
Sun & UV
New York's UV index is still reading High to Very High in the final week of August 2026, and the sun's angle in the sky barely differs from mid-April. Here is what that means for bare skin, sunscreen timing, and clothing coverage right now.
5 min read
Sun & UV
Los Angeles just logged its first three straight days of triple-digit heat since the 1880s, and the high-pressure dome driving it is also pushing UV into the very-high range across the whole metro, including the 85-degree coast.
6 min read
Sun & UV
Chicago's UV index is forecast to reach 7.8 today, a Very High reading typically associated with sunbelt cities. The reason it goes unprotected traces to a sensory mix-up between brightness and actual UV transmission.
5 min read
Sun & UV
When Miami tied its all-time heat record under an extreme UV reading, the real complication was not sunscreen washing off in sweat, but that some formulas slow sweating down in the first place.
5 min read
Sun & UV
A very high UV Index arrived in Phoenix the same week two Category 5 haboobs pushed local air quality to dangerous levels, and wind changes how long sunscreen actually lasts. Here's what the combination does to skin, and how the routine should shift when UV, wind, and pollution stack together.
5 min read
Sun & UV
Bemotrizinol became legal to use in US sunscreens on August 9, 2026, after a 21-year regulatory wait. Here is what the filter actually does, how it compares to avobenzone and zinc oxide, and when it will realistically reach shelves.
6 min read
