Seoul recorded its first tropical night of the year on Saturday, with morning temperatures reaching 25.2 °C [1].
The event marks the beginning of a dangerous heat cycle that increases the risk of heat-related illnesses for residents and visitors in the capital.
Yoo Da‑hyun, a weather caster at the Science Weather Department, said that a tropical-night advisory is issued when the minimum overnight temperature is expected to be 25 °C or higher [1]. The recorded temperature of 25.2 °C [1] officially met these criteria for the city.
This first tropical night occurred 12 days later than it did during the previous year [1]. Despite the delayed start, meteorologists expect a daytime heat wave to persist, prompting officials to warn the public about the dangers of heatstroke and exhaustion.
While Seoul is the primary focus, similar weather patterns and heat concerns have been reported in other regions, including Jeju, Gangneung, Pohang, Busan, and Gwangju [1].
"Today's morning temperature in Seoul was 25.2 degrees, and the first tropical night of the year appeared in Seoul," Yoo said [1].
Public health officials recommend staying hydrated and avoiding prolonged outdoor activity during peak sunlight hours as the heat wave continues to grip the region [1].
“Seoul recorded its first tropical night of the year with a morning temperature of 25.2 °C.”
The arrival of the first tropical night signifies a shift into the most intense period of the South Korean summer. When nighttime temperatures fail to drop below 25 °C, the human body cannot recover from daytime heat stress, which compounding the risk of heat-related mortality and increasing energy demands for cooling infrastructure across urban centers like Seoul.
