South Korea braces for summer heat with highs up to 30°C and very high UV index

Much of South Korea can expect a warm and sunny Friday, with temperatures climbing to early summer levels. Daytime highs are forecast to reach up to 30 degrees Celsius in many regions, similar to or slightly above average for this time of year. Morning temperatures will be cooler, ranging from 12 to 18 degrees Celsius.

Cities like Seoul, Suwon, and Chuncheon are expected to see highs around 28 degrees, while Daegu could reach 30 degrees. Coastal areas like Busan will be slightly cooler, around 26 degrees, and Jeju Island will experience highs of 25 degrees.

However, the sunny conditions will bring intense ultraviolet (UV) radiation, with UV index levels predicted to be "very high" across most of the country. Additionally, ozone concentrations may increase in the afternoon, prompting health advisories for those spending extended periods outdoors.

Residents in the inland and mountainous regions of northern and central Gangwon Province should prepare for scattered afternoon and evening showers. These showers could be accompanied by strong winds, thunderstorms, and even hail in the higher elevations. Authorities advise caution regarding potential flash floods and safety hazards in these specific areas.