UV radiation peaks prompt health warnings across Mexico, Spain and Romania

Authorities in Yucatán warned that UV index levels of 11‑12 will occur on 20 June, accompanied by temperatures up to 42 °C. The civil protection agency advised residents, especially children, the elderly and outdoor workers, to avoid direct sun between 11:00 and 16:00, use sunscreen of SPF 30 or higher, wear hats, sunglasses and stay hydrated.

Health experts in Sweden and Mexico echoed the advice, stressing that there is no such thing as a completely safe tan. They recommended limiting exposure during peak hours, using broad‑spectrum sunscreen, and protecting the eyes with UV‑blocking lenses. Experts also warned that even on cloudy days UV radiation can cause skin aging, cataracts and other eye diseases.

Romanian ophthalmologists highlighted specific summer eye risks, including conjunctivitis, dry‑eye syndrome, photokeratitis and infections from swimming with contact lenses. They urged people not to wear lenses in pools or the sea and to use well‑fitted swim goggles or daily disposable lenses if necessary.

Additional reports described how the summer solstice, the longest day of the year in the Northern Hemisphere, can disrupt circadian rhythms, reduce melatonin production and affect sleep, mood and metabolism. The increased daylight boosts serotonin and vitamin D synthesis but may also trigger summer‑type seasonal affective disorder in a minority of people.