1931 Yangtze-Huai Flood Disaster
Some 3 to 4 million people died and nearly 50 to 80 million people were left homeless during the China floods in the year 1931. The floods were caused by a rampant increase in the water levels of the Yangtze & Huai rivers caused by heavy rainfalls.
The flood was so enormous that it swept away and drowned as many as 200,000 people while they were sleeping. Even after the worst had gotten over post the floods receded, famine started gripping the country. Widespread diseases took over and killed millions.