Seoul residents are facing a return of extreme heat and tropical nights as the Korea Meteorological Administration reissued a heat-wave warning this week [1, 3].
The return of these conditions marks a sudden reversal in weather patterns after a brief period of relief. The resurgence of extreme heat increases the risk of heat-related illnesses and puts pressure on the city's energy infrastructure during the late summer season.
Seoul recorded a minimum temperature of 25.4°C during the night of Aug. 23–24 [1]. This marks the first tropical night the city has experienced in nine days, with the previous occurrence recorded on Aug. 14 [1].
Daytime temperatures across the region have surged. Seoul reached 33°C, while Gwangju hit 35°C [1]. In Gyeongju and Yangsan, temperatures climbed further to 36°C [1].
This weather shift comes 15 days after heat-wave advisories were downgraded on Aug. 9 [1]. The Korea Meteorological Administration said a north-Pacific high-pressure system has settled over the Korean Peninsula, driving the current spike in temperatures [1, 3].
While the current heat may not reach the extreme levels seen earlier this month, the agency said heat-waves and tropical nights are expected to persist for the time being [1].
Adding to the atmospheric instability is the formation of a new typhoon [1, 3]. Meteorologists are monitoring the system as it develops, noting that the combination of high pressure and tropical storm activity is increasing weather volatility across the peninsula [3].
Local officials have urged residents to remain vigilant regarding hydration, and heat exposure as the city navigates this second wave of summer intensity [1].
“Seoul recorded a minimum temperature of 25.4°C during the night of Aug. 23–24”
The recurrence of tropical nights and the reinstatement of heat-wave warnings suggest that the typical summer cooling trend in South Korea has stalled. The intersection of a dominant high-pressure system and a developing typhoon indicates a period of high atmospheric instability, which often leads to unpredictable weather swings and heightened disaster management requirements for urban centers like Seoul.
