The Korea Meteorological Administration sent four disaster-level heavy-rain emergency text messages to residents of Geoje and the southern Gyeongsangnam-do coast on Monday [4].
These alerts signify a critical threat to human life, triggered when rainfall reaches levels that can cause immediate urban flooding and isolation. The frequency of these warnings highlights the increasing volatility of seasonal weather patterns in the region.
Rainfall in Geoje surpassed 900 mm [1] over a period of 24 to 48 hours. This extreme accumulation prompted the government to activate its highest tier of emergency notifications. The Korea Meteorological Administration issues these specific "disaster-level" texts when hourly rainfall exceeds 100 mm [5].
During the early morning hours of Monday, the maximum hourly rainfall recorded in Geoje was 124.5 mm [2]. This event marks the second time this year that such an alert has been issued. The first disaster-level message of the year was previously sent to Suseong-gu, Daegu [1].
Local officials said that short bursts of intense rain often lead to vehicle submersion and the isolation of residents near riverbanks. In a separate context, reporters said that a previous event in Gunsan saw rainfall exceed 150 mm per hour [3], illustrating the lethal potential of such rapid accumulation.
Emergency services remained on high alert throughout the morning as the southern coast faced the brunt of the storm. The four messages sent during the early morning hours served as a directive for residents to seek higher ground and avoid low-lying areas [4].
“Cumulative rainfall in Geoje exceeded 900 mm.”
The issuance of two disaster-level alerts within a single year indicates a trend toward more extreme, concentrated precipitation events in South Korea. When hourly rainfall exceeds the 100 mm threshold, traditional drainage systems in urban centers like Geoje are often overwhelmed, shifting the risk from general flooding to immediate life-threatening emergencies such as flash floods and structural collapses.
