1931 China floods

The 1931 China floods, or the 1931 Yangtze–Huai River floods, occurred from June to August 1931 in China, hitting major cities such as Wuhan, Nanjing and beyond, and eventually culminated in a dike breach along Lake Gaoyou on 25 August 1931. Fatality estimates vary widely. A field survey by the University of Nanking led by John Lossing Buck immediately after the flood found "150,000 people had drowned, and that this number represented less than a quarter of all fatalities during the first 100 days of the flood." The official report found 140,000 drowned and claims that "2 million people died during the flood, having drowned or died from lack of food". A cholera epidemic in the subsequent year, from May 1932, was officially reported to have 31,974 deaths and 100,666 cases. While frequently featured in the list of disasters in China by death toll, a popular high-end estimate of 3.7 to 4.0 million fatalities is instrumental in "helping the 1931 flood to secure its position on sensationalist lists of the world’s deadliest disasters." From 1928 to 1930, China was afflicted by a long drought. The subsequent winter of 1930–31 was particularly harsh, creating large deposits of snow and ice in mountainous areas. In early 1931, melting snow and ice flowed downstream and arrived in the middle course of the Yangtze during a period of heavy spring rain. Ordinarily, the region experienced three periods of high water during the spring, summer and fall, respectively; however, in early 1931, there was a single continuous deluge. By June, those living in low areas had already been forced to abandon their homes. The summer was also characterized by extreme cyclonic activity. In July of that year alone, nine cyclones hit the region, which was significantly above the average of two per year. Four weather stations along the Yangtze River reported rain totalling over for the month. The water flowing through the Yangtze reached its highest level since record-keeping began in the mid-nineteenth century.