2011 Seoul floods

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2011 Korean floods
2011년 7월 우면산 산사태 서울소방 복구 활동 SFS 1908.jpg
After raining, The Apartment is destruction.
DateJuly 25 – 28, 2011 (KST)
Location South Korea
 North Korea
DeathsAt least 69 (8 missing)
Property damageSeveral hundred million USD

The 2011 Seoul floods were a series of floods in late July 2011 caused by heavy rainfall around Seoul, South Korea. The intense rain triggered a series of flash floods and landslides that killed at least 49 people[1] by July 27, leaving a total of more than 77 dead or missing.[2][3] On July 27, the number of killed rose further to 69.[4] The floods occurred primarily around the national capital Seoul and nearby Siheung regions. At least 86 power outages followed the landslides, affecting 125,000 people by July 27. Over 11,000 South Koreans were forced to evacuate.[5][6]

Causes and meteorology[edit]

On July 25, rains and thunderstorms triggered by a trough hit the mountains of the Korean Peninsula, producing over 495 mm (19.5 in) of rain in the Seoul region during a two-day span, the heaviest such event in July since 1907.[5] 587 mm (23.1 in) of rain was recorded in the area after three days.[6]


On July 26, a landslide buried three hotels in Chuncheon, east of Seoul, killing 13 people from Inha University.[5] A landslide in Umyeon-dong killed 18 residents in an apartment block.[3] Floodwaters inundated highways and tracks of the Seoul Metropolitan Subway, while bridges over the Han River were closed off. Damages are likely to be in the hundreds of millions USD. Motor vehicle damages reached $38 million on July 28. Close to 978 ha (2,420 acres) of agricultural land and more than 10,000 homes were flooded.[3]

Economic damage[edit]

Rail infrastructure in South Korea was impacted, while a South Korean investment analyst expected economic inflation to reach 4.6%.[6]

Political issues[edit]

An editorial from Kyunghyang Shinmun sought Mayor of Seoul Oh Se-hoon as the main culprit of the worsened flood crisis; as both of his Hangang Renaissance project and his Design Seoul project (redesigned some streets in Seoul) had further increased the overall damage of the flooding.[7]

There is a concern whether the Umyeon-san landslide was a natural cause or an intentional negligence of prevention by the government.[8]

Landmine threat[edit]

Approximately ten landmines from the Korean War in the vicinity of Umyeon were buried by a landslide on July 26, and have not been recovered as of July 28.[3]

North Korean floods[edit]

In neighbouring North Korea, nearly 100 km2 (39 sq mi) of land was flooded, with the worst impact in South Hwanghae. Fatalities and damages are unknown.[6]

See also[edit]


  1. ^ Desk, News (July 28, 2011). "Historic Flooding, Landslides Kill at Least 49 in South Korea". PBS Newshour. Retrieved 29 July 2011.
  2. ^ Laurence, Jeremy; Seongbin Kang (July 29, 2011). "South Koreans on landmine alert after deadly mudslides". The China Post. Retrieved 29 July 2011.
  3. ^ a b c d Laurence, Jeremy; Seongbin Kang (July 28, 2011). "UPDATE 2-S.Koreans on landmine alert after deadly mudslides". Reuters. Retrieved 29 July 2011.
  4. ^ Rabiroff, Jon (July 29, 2011). "U.S. military bases in Korea begin cleanup after massive rainstorm". Stars and Stripes. Retrieved 29 July 2011.
  5. ^ a b c Reuters, TWN (July 28, 2011). "Scores dead or missing after heavy rains and landslides hit Seoul". The Weather Network News. Retrieved 29 July 2011.
  6. ^ a b c d Cha, Seonjin; Jun Yang (July 28, 2011). "Landmines Go Missing From Seoul Hillside After Torrential Rains". Bloomberg. Retrieved 29 July 2011.
  7. ^ "Mayor Oh Must End Referendum Plan". Kyunghyang Shinmun. 2011-08-01. Retrieved 2011-08-04.
  8. ^ Kwon (권), Hyeok-cheol (혁철) (2011-09-15). "우면산 산사태는 '천재지변' 결론…주민 반발". The Hankyeoreh (in Korean). Retrieved 2011-10-05.