The alley of the ironworks in Mullae-dong 4-ga, Yeongdeungpo-gu, Seoul. Kim Heung-gyu (59), who runs an industrial company here, looked at the drainage ditch on the 7th and said, “I’ve been out since dawn watching.” His workplace was submerged in water in consecutive years in 2022 and 2023. At that time, we had to throw away all the wet tools and dry the machine, causing damage worth 20 million won. He said, “I am anxious that if heavy rain falls in a short period of time, the nearby Dorim Stream will quickly swell and become flooded again.” In Seoul, ‘repeated flooding’, in which buildings that have been flooded once are submerged in rainwater again over the years, is concentrated in certain areas. When heavy rain exceeding 100 mm per hour was concentrated in August 2022, flood damage was concentrated in Yeongdeungpo-gu (3,534 places), Seocho-gu (1,347 places), and Gangnam-gu (490 places). However, 81 of the 179 buildings that were flooded again between 2023 and 2025 were in Mullae-dong, Yeongdeungpo-gu. The Dorimcheon Stream, which is not wide and deep enough, cannot handle the rainwater, so it floods low-lying areas. Resident Park Sang-jin (58) said, “When it rains, we go to CCTV.