The nation has seen 25 tornadoes that killed 80 or more people since 1840, according to the National Oceanic and Atmospheric Administration.

These are the 10 deadliest tornadoes in U.S. history:

March 18, 1925: The Tri-State Tornado killed nearly 700 in Missouri, southern Illinois, and southwestern Indiana.
May 6, 1840: The Great Natchez Tornado in Mississippi killed 317.
May 27, 1896: St. Louis area tornadoes killed 305 in Missouri, Illinois, and Kentucky.
April 5, 1936: Tupelo, Miss. tornado killed 216.
April 6, 1936: Gainsville, Ga., tornado killed 203.
April 9, 1947: Woodward, Okla., tornado killed 181.
May 22, 2011: Joplin, Mo. tornado killed 158.
April 24, 1908: Tornado in Louisiana and Mississippi killed 143.
June 12, 1899: Western Wisconsin tornado killed 117.
June 8, 1953: Flint, Mich., tornado killed 116.