Many cities have very high UV indexes.

Illustration photo: Le Phu/Tin Tuc Newspaper

The time of maximum UV index usually occurs from 10am to 1pm.

Specifically, on May 5, the UV index in the cities: Ha Long (Quang Ninh province) was 9.2, Hai Phong 9.6, Hanoi 9.6, Hue (Thua Thien-Hue province) was 9.5, Da Nang 9.7, Hoi An (Quang Nam province) 9.5, Nha Trang (Khanh Hoa province) 9.8, Ho Chi Minh City 9.7, Can Tho 9.8, Ca Mau (Ca Mau province) was 7.8.

From May 6 to 8, the UV index in the cities was: Ha Long (Quang Ninh province) 8.5.7; Hai Phong 9.5.5; Hanoi 10.4.4; Hue (Thua Thien-Hue province) 10.10.7; Da Nang 10.10.9; Hoi An (Quang Nam province) 10.10.10; Nha Trang (Khanh Hoa province) 10.10.10; Ho Chi Minh City 10.9.8; Can Tho 10.10.9; Ca Mau (Ca Mau province) 10.10.10.

The UV index scale states that 3-6 is average, 6-8 is high, 8-10 is very high, causing burns within 25 minutes, and 11 or higher is extremely high, very dangerous, with a risk of skin damage and eye burns when exposed to sunlight for about 15 minutes without protection.

Doctors recommend that people take proactive measures to protect their bodies from the harmful effects of ultraviolet rays, such as wearing sunglasses that block ultraviolet rays, hats, and sun-protective clothing, limiting sun exposure during peak hours, using broad-spectrum sunscreen, and reapplying sunscreen every 2 hours.

According to VNA