In the 1931 China floods, one of the deadliest flood disasters in world history, Wuhan was a refuge for flood victims from outlying areas, who had been arriving since the late spring. But when the city itself was inundated in the early summer, and after a catastrophic dike failure just before 6:00 AM on July 27, an estimated 782,189 urban citizens and rural refugees were left homeless. The flood covered an area of 32 square miles and the city was flooded under many feet of water for close to three months. Large numbers gathered on flood islands throughout the city, with 30,000 sheltering on a railway embankment in central Hankou. With little food and a complete breakdown in sanitation, thousands soon began to succumb to diseases. Jin Shilong, Senior Engineer at the Hubei Flood Prevention Agency, described the flooding:There was no warning, only a sudden great wall of water. Most of Wuhan's buildings in those days were only one story high, and for many people there was no escape – they died by the tens of thousands. ... I was just coming off duty at the company's main office, a fairly new three-story building near the center of town ... When I heard the terrible noise and saw the wall of water coming, I raced to the top story of the building. ... I was in one of the tallest and strongest buildings left standing. At that time no one knew whether the water would subside or rise even higher.The high-water mark was reached on August 19 at Hankou, with the water level exceeding above normal. In 1936, when natural disaster struck Central China with widespread flooding affecting Hebei, Hunan, Jiangxi, Wuhan and Chongqing caused by the Yangtze and Huai Rivers bursting their banks, Ong Seok Kim, as Chairman of the Sitiawan Fundraising and Disaster Relief Committee, raised money and materials in support of the victims.