South Korea is facing an intensifying heatwave with temperatures reaching 37.4 °C in Gyeongju and unofficial peaks of 39.9 °C in Gyeongsan [1, 2].
The extreme weather poses significant public health risks as tropical nights and soaring daytime temperatures affect nearly every region of the country. The Korea Meteorological Administration has issued heat warnings for the majority of the nation, excluding only the high-mountain zones of Gangwon [3].
Officials said the heat intensified following the end of the monsoon season. This transition left the region with high pressure and clear skies, which allowed surface temperatures to rise rapidly [2].
In Gyeongju, the official highest temperature was recorded at 37.4 °C [1]. Meanwhile, an unofficial report from Hayang-eup in Gyeongsan indicated a peak of 39.9 °C [1]. These extremes are coupled with a nationwide perceived temperature of around 33 °C, while the Yeongnam region experienced perceived temperatures reaching up to 35 °C [1].
The heat warnings currently cover a wide array of urban and provincial areas. Affected regions include Seoul south, Gyeonggi Province, Gwangju, Busan, and South Jeolla [3].
Reporter Ko Han-seok said the extreme heat is expected to continue until the middle of next week [1]. This timeline suggests the oppressive conditions will persist until approximately July 14 or 15 [1, 4].
Local authorities are monitoring the situation as the "steamer-like" heat persists. The combination of high humidity and temperature has created a challenging environment for residents and infrastructure across the peninsula [1].
“The Korea Meteorological Administration has issued heat warnings for the majority of the nation.”
The rapid transition from the monsoon season to a high-pressure system creates a 'steamer' effect, where high humidity traps heat. This pattern increases the risk of heatstroke and puts significant strain on the electrical grid due to increased air conditioning demand, particularly in densely populated hubs like Seoul and Busan.
