The 1931 China Floods were the deadliest natural disaster of the century. The death toll was estimated to be between 3.7 and 4 million people. People died from drowning and diseases in the water. Experts say that it was the worst flood of all times. There was a massive drought for the two years preceding the disaster. It was caused by three rivers in China flooding; the Yellow River, the Yangtze River and the Huai River. These rivers were flooded for several months starting in July. The average water level was 1.7 meters. These floods cut people off from all necessities such as food and shelter. There have been reports of cannibalism as a result. The government was having many problems at the time (civil war, Japanese war and lack of funding), so they could not do much to prevent future flooding. They built small dams on the Yangtze River.