Seoul experienced a severe heatwave this month, with temperatures peaking at 42.5°C on Sunday, Aug. 2 [1].
The extreme weather marks a significant public health risk for the city's millions of residents. The intensity of the heat has forced authorities to implement emergency warnings to mitigate heat-related illnesses and deaths in the dense urban environment.
Thermal-camera footage recently captured the impact of the heat on pedestrians and vehicles throughout the city [1]. The images illustrate how urban surfaces and traffic contribute to the heat island effect, trapping warmth in the streets of the South Korean capital [2].
The weather event was characterized by an unprecedented climb in temperature. Seoul set three all-time high temperatures within a single week [1]. This rapid escalation culminated in the peak recording of 42.5°C [1].
In response to the crisis, officials issued a "severe heatwave warning" [1]. This represents the first time such a warning has been issued this year [1]. The measure was designed to alert the public to the dangers of prolonged exposure to the sun and high ambient temperatures.
City infrastructure and traffic flow were visibly affected as the heatwave persisted. Thermal imaging showed the extreme temperatures radiating from the asphalt and vehicle engines, highlighting the difficulty of maintaining cool environments in a metropolis during a record-breaking summer [2].
“Seoul set three all-time high temperatures within a single week”
The issuance of the first severe heatwave warning of the year and the recording of three all-time highs in one week suggest an intensifying trend of urban heat extremes in Seoul. The use of thermal imaging to document this event underscores the critical intersection between climate change and the 'urban heat island' effect, where city infrastructure exacerbates natural temperature rises, necessitating more aggressive public health interventions.
