2011 Seoul Floods, South Korea

Heavy rainfall in South Korea in late July 2011 triggered a series of flash floods and landslides that killed at least 49 people by July 28, leaving a total of more than 77 dead or missing. On July 28, 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 28. Over 11,000 South Koreans were forced to evacuate.
Causes and meteorology
On July 26, 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. 587 mm (23.1 in) of rain was recorded in the area after three days.