1931 China Floods

The 1931 China Floods are the deadliest natural disaster in recorded history, with a death toll between 1 million and 4 million people — over 400 times higher than the 2011 Tōhoku earthquake and tsunami. The Yellow, Yangtze, and Huai rivers overflowed from June to August 1931, inundating entire provinces for months, destroying crops, and triggering famine and disease that killed far more than the initial floods. An estimated 3.7 million deaths from famine alone exceed the total fatalities of the 2004 Indian Ocean Tsunami. This disaster weakened the Nationalist government and contributed to political instability that Communist forces exploited.