Seoul authorities expanded a top-level heat wave warning to cover the entire city on Tuesday after temperatures surged across the capital [1].
The expansion of the '폭염 중대경보' alert comes as the city faces a prolonged period of extreme heat with no rain forecast through early next week [1]. This level of warning triggers emergency protocols to protect vulnerable populations, and manage urban heat islands in densely populated districts.
Official readings for the city reached a daytime high of 36.9°C [1]. However, unofficial temperature monitors in specific districts reported significantly higher peaks. In Guro-gu, readings hit 39°C [1], while Gangnam-gu recorded a high of 39.2°C [1].
The extreme weather has impacted visitors and residents alike. Kim Seung-hyun, a visitor from Daegu Jung-gu, said the capital felt more oppressive than their hometown. "I think Seoul is hotter than Daegu," Kim said [3].
Meteorologists attribute the spike to a westward-moving heat wave that has settled over the region [2]. The lack of precipitation is expected to sustain these high temperatures for several days, increasing the risk of heat-related illnesses across the metropolitan area [1].
City officials are monitoring the situation closely as the heat persists. The disparity between official weather station data and unofficial district readings highlights the impact of urban heat—where concrete and asphalt trap heat more effectively than the outlying areas where official stations are often located [1].
“Seoul authorities expanded a top-level heat wave warning to cover the entire city”
The disparity between Seoul's official temperature of 36.9°C and the unofficial 39.2°C readings in Gangnam underscores the 'urban heat island' effect. When a city expands a top-level warning to all districts, it indicates that the heat is no longer localized but is a systemic risk to the city's infrastructure and public health, especially with no immediate rain to provide cooling.
