| Year | Death tolls | Event | Countries affected | Type | Date |
| 1900 | 6,000–12,000 | 1900 Galveston hurricane | United States | Tropical cyclone | September 9 |
| 1901 | 9,500 | 1901 eastern United States heat wave | Heat wave | June–July |
| 1902 | 29,000 | 1902 eruption of Mount Pelée | Martinique | Volcanic eruption | April–August |
| 1903 | 3,500 | 1903 Manzikert earthquake | Turkey | Earthquake | April 29 |
| 1904 | 400 | 1904 Sichuan earthquake | China | August 30 |
| 1905 | 20,000+ | 1905 Kangra earthquake | India | April 4 |
| 1906 | 15,000 | 1906 Hong Kong typhoon | Hong Kong | Tropical cyclone | September 18 |
| 1907 | 12,000–15,000 | 1907 Qaratog earthquake | Uzbekistan | Earthquake | October 21 |
| 1908 | 75,000–82,000 | 1908 Messina earthquake | Italy | December 28 |
| 1909 | 6,000–8,000 | 1909 Borujerd earthquake | Iran | January 23 |
| 1910 | 2,450 | 1910 Costa Rica earthquakes | Costa Rica | May 4 |
| 1911 | 41,072 | 1911 France heat wave | France | Heat wave | June–August |
| 1912 | 50,000–220,000 | 1912 China typhoon | China | Tropical cyclone | August 29 |
| 1913 | 942–1,900 | 1913 Eshan earthquake | Earthquake | December 21 |
| 1914 | 2,344 | 1914 Burdur earthquake | Turkey | October 4 |
| 1915 | 29,978-32,610 | 1915 Avezzano earthquake | Italy | January 13 |
| 1916 | 2,000–10,000 | White Friday avalanches | Avalanche | December 13 |
| 1917 | 1,500 | 1917 Bali earthquake | Indonesia | Earthquake | January 21 |
| 1918 | 1,000 | 1918 Shantou earthquake | China | February 13 |
| 1919 | 5,000 | 1919 Kelud mudflow | Indonesia | Volcanic eruption | May 19 |
| 1920 | 258,707–273,407 | 1920 Haiyuan earthquake | China, Mongolia | Earthquake | December 16 |
| 1921 | 215 | September 1921 San Antonio floods | United States | Flood | September 7 –11 |
| 1922 | 50,000–100,000+ | 1922 Shantou typhoon | Philippines, China | Tropical cyclone | July 27 –August 3 |
| 1923 | 105,385-142,800 | 1923 Great Kantō earthquake | Japan | Earthquake | September 1 |
| 1924 | 1,000 | Great flood of 99 | India | Flood | July |
| 1925 | 5,000 | 1925 Dali earthquake | China | Earthquake | March 16 |
| 1926 | 709 | 1926 Havana–Bermuda hurricane | Cuba, United States, Bahamas, Bermuda | Tropical cyclone | October 14 –28 |
| 1927 | 40,912 | 1927 Gulang earthquake | China, Tibet | Earthquake | May 22 |
| 1928 | 4,112+ | 1928 Okeechobee hurricane | United States, Puerto Rico, Guadeloupe, Bahamas, Dominica, | Tropical cyclone | September 12 –21 |
| 1929 | 3,257–3,800 | 1929 Kopet Dag earthquake | Iran, Turkmenistan | Earthquake | May 1 |
| 1930 | 2,000–8,000 | 1930 San Zenón hurricane | Dominican Republic | Tropical cyclone | September 3 |
| 1931 | 422,499–4,000,000 | 1931 China floods | China | Flood | July – November |
| 1932 | 3,103+ | 1932 Cuba hurricane | Cayman Islands, Cuba | Tropical cyclone | November 9 |
| 1933 | 6,865–9,300 | 1933 Diexi earthquake | China | Earthquake | August 25 |
| 1934 | 10,700–12,000 | 1934 Nepal–India earthquake | Nepal, India | January 15 |
| 1935 | 145,000 | 1935 Yangtze flood | China | Flood | July 6 |
| 1936 | 5,000+ | 1936 North American heat wave | United States, Canada | Heat wave | June – September |
| 1937 | 11,021 | 1937 Great Hong Kong typhoon | China | Tropical cyclone | September 2 |
| 1938 | 715+ | 1938 Hanshin flood | Japan | Flood | July |
| 1939 | 32,700–32,968 | 1939 Erzincan earthquake | Turkey | Earthquake | December 27 |
| 1940 | 1,000 | 1940 Vrancea earthquake | Romania | November 10 |
| 1941 | 1,200 | 1941 Jabal Razih earthquake | Yemen | January 11 |
| 1942 | 61,000 | 1942 West Bengal cyclone | India | Tropical cyclone | October 14 – 18 |
| 1943 | 2,824-5,000 | 1943 Tosya–Ladik earthquake | Turkey | Earthquake | November 27 |
| 1944 | 10,000 | 1944 San Juan earthquake | Argentina | January 15 |
| 1945 | 4,000 | 1945 Balochistan earthquake | Pakistan | November 28 |
| 1946 | 2,550 | 1946 Dominican Republic earthquake | Dominican Republic | August 4 |
| 1947 | 1,077 | Typhoon Kathleen | Japan | Tropical cyclone | September 15 |
| 1948 | 10,000–110,000 | 1948 Ashgabat earthquake | Soviet Union, Iran | Earthquake | October 6 |