Heatwave and Heavy Rain Hit Korea Despite Seasonal Change
Even though the traditional seasonal marker “Cheoseo” has passed—a time when heat is supposed to ease—the reality outside still feels like the peak of midsummer. Across the country, heatwave warnings have been issued, and the air remains thick and heavy even at night. In fact, many cities including Seoul and coastal regions experienced tropical nights, where the temperature stayed high enough to make sleep nearly impossible. In Gangneung, early morning temperatures reached close to 28 degrees, but with the humidity factored in, it felt more like 30. For Seoul, the tropical nights have continued for over a week straight, making mornings feel as stifling as the afternoons.
During the daytime, the heat is even more relentless. Temperatures are soaring into the mid-thirties, with some regions in the southeast like Daegu and Gumi climbing as high as 36 or 37 degrees. These levels are record-breaking for late August and create conditions where heat-related illnesses are a serious concern. Officials continue to emphasize three golden rules for outdoor activity: stay hydrated, rest in the shade, and avoid prolonged exposure. Ultraviolet radiation is also strong at this time, with levels categorized as “high” to “very high,” so protective clothing, hats, and sunglasses are being advised.
Also Read:What makes this weather more challenging is that the sweltering heat is being interrupted by sudden showers. Due to unstable atmospheric conditions, localized downpours are expected across many areas. These showers may temporarily cool the air but usually end up raising the humidity even further, leaving the heat feeling more suffocating. Rainfall amounts could vary from light, brief bursts to heavier downpours reaching 40 millimeters. And tomorrow, especially in central regions, the risk of localized torrential rain will increase, with forecasts warning of as much as 100 millimeters of rain in certain areas within just a short period.
For those seeking relief by heading to mountain valleys or riversides, safety remains a top concern. Streams and valleys may look inviting but can turn dangerous quickly. Water depth changes abruptly in many places, and strong currents can appear without warning, especially if sudden rainfall occurs upstream. Wearing life vests, staying in groups rather than swimming alone, and avoiding alcohol before entering the water are being strongly emphasized. Even recreational items like tubes or floats should not be overly relied upon in these conditions, since swift currents can sweep them away easily.
Looking ahead, the last week of August will not bring much comfort. Central Korea is expected to experience more frequent rain showers, including heavy bursts between Monday and Tuesday. Yet even with the rainfall, the extreme heat is not expected to fade quickly. For now, people are being asked to prepare both for intense heat during the day and unpredictable showers that can turn into sudden storms. Staying cautious about heatstroke, food safety, and safe outdoor activity is more important than ever as this unusual late-summer weather pattern continues.
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