South Korea is experiencing an extreme heat wave this week with temperatures approaching 43°C in several southern regions [1].
The simultaneous arrival of a super-typhoon and a strong high-pressure ridge creates a dangerous weather convergence that threatens public health and infrastructure across the peninsula.
Weather-disaster reporter Jung Hye-yoon said that temperatures in Yangsan, Gyeongsangnam-do, rose to nearly 43°C [1]. Other areas, including northern Changwon and Miryang, recorded temperatures of 41°C [1]. Several other locations in the Yeongnam region, such as Kimhae, Uiryeong, Gyeongju, and northern Busan, also reported temperatures exceeding 40°C [1].
Local media have described the phenomenon as "hell heat," suggesting the nation has transformed into a giant steamer. An unnamed YTN anchor said the extreme heat is currently raging across the country [1].
The current conditions are driven by an unusually strong high-pressure ridge. This system is interacting with a super-typhoon moving north, which meteorologists said is comparable in scale and intensity to past storms such as Typhoon Lusa or Maemi [1].
Experts said that the typhoon is expected to bring additional heat and humidity to the capital region, including Seoul and surrounding western provinces [1]. The combination of these systems may trap hot air over the region, prolonging the duration of the heat wave and increasing the risk of heat-related illnesses.
Residents in the capital region and Gyeongsangnam-do, including Gangneung, are being urged to take precautions as the storm's influence intensifies [1].
““Hell heat” is the term being used to describe the current extreme temperatures.”
The convergence of a high-pressure ridge and a super-typhoon creates a 'heat dome' effect, where hot air is trapped and compressed. By comparing the current system to Typhoon Lusa and Maemi, meteorologists are signaling a high-risk event that could lead to record-breaking temperatures and severe humidity, placing immense strain on the energy grid and public health systems in the Seoul metropolitan area.
