A natural disaster might be caused by earthquakes, flooding, volcanic eruption, landslide, hurricanes etc. In order to be classified as a disaster, it will have profound environmental effect and/or human loss and frequently incurs financial loss.
This is a list of ten deadliest natural disasters since 1900. You will be surprised to see the death tall of China floods in 1931.
10. 138,866
Bangladesh cyclone Bangladesh April 29, 1991
9. 142,000
Great Kanto earthquake Japan September 1923
8. 145,000
Yangtze river flood China 1935
7. 229,000
Typhoon Nina—contributed to Banqiao Dam failure China August 7, 1975
6. 230,000
Indian Ocean Earthquake and Tsunami Indian Ocean 26th December 2004
5. 273,400
Haiyuan earthquake China December 1920
4. 316,000
Haiti earthquake Haiti January 12th 2010
3. 500,000
Bhola cyclone East Pakistan (now Bangladesh) November 1970
2. 650,000–779,000
Tangshan earthquake China July 1976
1. 1,000,000–4,000,000
China floods China July 1931
* Does not include industrial or technological accidents or epidemics nor the 1938 Yellow River flood.