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 by july 27, leaving a total of more than 77 dead or missing. on july 27, the number of killed rose further to 69. 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.