Morning rain to give way to afternoon heatwave across South Korea, with highs up to 34C

South Korea is bracing for a day of contrasting weather, with heavy morning rain expected in some areas giving way to a widespread heatwave in the afternoon. The Korea Meteorological Administration forecasts that rain will continue until the afternoon in the Seoul metropolitan area, Gangwon Province, and Jeju Island. Northern parts of Gyeonggi and Gangwon provinces could see intense downpours, with rainfall rates reaching up to 50 millimeters per hour.

The forecast warns of potential safety hazards due to the heavy rain. Authorities caution that sudden rises in river levels, flooding in low-lying areas and underpasses, and landslides could occur. In addition to the steady rain, some regions will experience showers accompanied by strong winds, thunder, and lightning, with hourly rates of 20-30 millimeters.

Following the rain, a significant temperature increase is expected across the country. Most regions will see daytime high temperatures climb above 30 degrees Celsius, with some reaching as high as 34 degrees. The perceived temperature will hover around 31 degrees, and in areas with heatwave advisories, it could reach 33 degrees, creating very muggy conditions. The air quality is expected to be good nationwide.