Authorities issued a heavy rain warning on Tuesday for several districts in Seoul as rain clouds approached from the West Sea [1].

These warnings are critical for urban centers like Seoul, where sudden intense rainfall can lead to rapid flash flooding and disrupt major transportation networks. The timing of the system puts pressure on city drainage systems and emergency response teams during the peak of the summer season.

Weather monitors indicate that the rain clouds are moving from the West Sea toward the city [2]. The warning specifically targets the northeast and northwest sectors of the capital [1]. However, reports on the exact coverage vary, with some sources indicating the southwest sector is also affected [2].

Forecasters expect rainfall intensity to range between five and 20 mm per hour [2]. This level of precipitation can cause significant visibility issues for drivers and potential accumulation in low-lying areas. Local officials said residents should remain vigilant and monitor official weather updates as the system progresses through the metropolitan area.

City infrastructure is currently being monitored to prevent overflows in the northeast and northwest regions [1]. The movement of these clouds suggests a period of instability that could persist throughout the day. Residents are advised to avoid crossing flooded underpasses or streams during the height of the storm.

“Rain clouds are moving from the West Sea toward the city”

The issuance of a heavy rain warning in Seoul underscores the city's vulnerability to localized, high-intensity precipitation events. While 20 mm per hour is not an extreme total, the concentration of rain in specific urban sectors like the northeast and northwest can overwhelm drainage systems, leading to localized flooding and traffic gridlock in one of the world's most densely populated cities.