Seoul officials expanded the highest-level heat-wave warning to cover the entire city on Aug. 4 [4].
The expansion follows a surge in temperatures that threatens public health and urban infrastructure during one of the region's most intense heat periods.
While the official high for Seoul was recorded at 36.9 °C [1], specific districts experienced significantly higher peaks. Gangnam-gu reached 39.2 °C [2], and Guro-gu hit 39 °C [3]. In Guro-gu, these extreme temperatures persisted for two consecutive days, according to YTN caster Won Chae-young, who said the area faced extreme heat.
The intense weather is driven by a westward shift of extremely hot air [5]. Meteorologists said that the heat will likely persist because there is no rain forecast in the near term [5].
The severity of the heat has been noted by visitors from other traditionally hot regions. Kim Seung-hyun, a visitor from Daegu Jung-gu, said that Seoul seemed hotter than Daegu.
Local authorities have implemented the critical alert to ensure emergency services, and cooling centers are fully operational across all districts. The city remains on high alert as the atmospheric conditions prevent any immediate cooling trend.
“Seoul's top heat-wave warning was extended city-wide on 4 August 2026”
The expansion of the highest-level warning suggests that the urban heat island effect in Seoul is compounding a broader regional weather pattern. When temperatures in dense districts like Gangnam and Guro significantly exceed the official city average, it indicates a critical risk of heat-related illnesses and energy grid strain, particularly in the absence of precipitation to temper the air.
