Vietnam is forecast to see extreme ultraviolet (UV) radiation between Saturday and Monday, with Ho Chi Minh City and the Mekong Delta city of Can Tho going to suffer a very high harmful risk on the weekend.
On Friday, the northern cities of Hanoi, Hai Phong, and Ha Long reported a very high UV index reading at noon, said Dang Dinh Quan from the National Hydrology Meteorology Forecast Center.
From Saturday to Monday, the UV index in northern localities is forecast to reach an extreme reading with high harmful risk to human health under sunlight exposure.
In central Vietnam, Hue and Da Nang may face a high harmful risk on Sunday and Hoi An could see the same danger on Saturday and Sunday.
In the localities from south-central Khanh Hoa to southern Ca Mau, UV index readings are projected to cause harmful risks at an average level, but those in Ho Chi Minh City and Nha Trang City will be very high on Saturday and high on Sunday.
Meanwhile, the Mekong Delta city of Can Tho may be subject to a very high harmful risk on Sunday.
According to experts, strong impacts of UV radiation may cause heatstroke, cramp or exhaustion given long exposure to sunlight.
Excessive contact with UV radiation may lead to skin cancer and hurt human immune systems.
People are recommended to wear sun-resistant hats, sunglasses, and coats when outdoors, use sunscreen and consume fruits rich in vitamin C.