The 10 deadliest U.S. tornadoes on record The "Tri-State" tornado of 1925 traveled through Missouri, Illinois and Indiana, killing nearly 700 people. (CNN) -- Here are the 10 deadliest tornadoes to touch down in the United States, according to the National Oceanic and Atmospheric Administration: The "Tri-State Tornado" killed 695 people and injured 2,027, traveling more than 300 miles through Missouri, Illinois and Indiana on March 18, 1925. It was rated an F5 at the top of the old Fujita scale (with winds of 260-plus mph). The "Natchez Tornado" killed 317 people and injured 109 on May 6, 1840, along the Mississippi River in Louisiana and Mississippi. The official death toll may not have included slaves, according to the Federal Emergency Management Agency. The "St. Louis Tornado" of 1896 killed 255 people in Missouri and Illinois. The "St. Louis Tornado" killed 255 people and injured 1,000 on May 27, 1896, in Missouri and Illinois. It had winds of between 207 mph and 260 mph. The "Tupelo Tornado" killed 216 people and injured 700 on April 5, 1936, in the northeastern Mississippi city. The "Gainesville Tornado" was a pair of storms that converged April 6, 1936, in Gainesville, Georgia, killing 203 people and injuring 1,600. The tornado destroyed four blocks and 750 houses in the northern Georgia town. The "Woodward Tornado" wreaked havoc across parts of Texas, Oklahoma and Kansas on April 9, 1947. The storm, which killed 181 people and injured 970, reportedly was more than a mile wide in places. A search team looks for possible victims after a tornado hit Joplin, Missouri, in May 2011. The tornado that struck Joplin, Missouri, on May 22, 2011, killed 158 people and injured more than a thousand. The storm packed winds in excess of 200 mph and was on the ground for more than 22 miles. The "Amite/Pine/Purvis Tornado" killed 143 people and injured 770 on April 24, 1908. The storm left only seven houses intact in Purvis, Mississippi, and also caused damage in Amite, Louisiana. The "New Richmond Tornado" killed 117 people and injured 200 on June 12, 1899, in New Richmond, Wisconsin. The "Flint Tornado" killed 115 people and injured 844 on June 8, 1953, in Flint, Michigan. The tornado was the deadliest twister ever recorded in the state. Oklahoma City Tornadoes Heavy storms and tornadoes once again ripped through the Midwest. Here's how you can help. May 30, 2013 -- Updated 1530 GMT (2330 HKT) Families share memories and snapshots of those we lost in the Oklahoma tornado devastation. May 27, 2013 -- Updated 1941 GMT (0341 HKT) The magnitude of the tornado that tore through Moore, Oklahoma, is hard to imagine. June 1, 2013 -- Updated 2342 GMT (0742 HKT) David Stottlemyre was inside an oil field repair shop in El Reno, Oklahoma, when he saw a tornado "looking at us dead in the eye." May 26, 2013 -- Updated 1701 GMT (0101 HKT) It was like any other day. If anything, it might have been a little better than usual, the principal recalled. May 22, 2013 -- Updated 1439 GMT (2239 HKT) It's one of the most familiar pieces of advice from authorities to people in the path of a tornado: Get into your basement. May 23, 2013 -- Updated 1155 GMT (1955 HKT) On Sunday, a mystery photograph fluttered from the sky and landed near Leslie Hagelberg's mailbox in West Tulsa, Oklahoma. The tornado spanned 1.3 miles -- the length of more than 22 football fields lined up end-to-end -- carved a 17-mile path of destruction. May 23, 2013 -- Updated 1130 GMT (1930 HKT) Photographer Paul Hellstern snapped his shutter just minutes after the tornado reduced Oklahoma City's Briarwood Elementary School to rubble. May 22, 2013 -- Updated 1831 GMT (0231 HKT) Second-grade teacher Tammy Glasgow walks around what's left of Briarwood Elementary, struggling to pick out of its wreckage the things that once made a school. May 22, 2013 -- Updated 1319 GMT (2119 HKT) It was the end of the school day. The kids at Plaza Towers Elementary School were stuffing their backpacks, looking forward to going home, playing with friends, eating snacks. May 23, 2013 -- Updated 1044 GMT (1844 HKT) Inside Moore Medical Center's emergency room, Dr. Stephanie Barnhart had been monitoring the weather all afternoon. May 22, 2013 -- Updated 1515 GMT (2315 HKT) The governor of Oklahoma, Mary Fallin, says it is "hard to believe" another monster tornado could devastate the Oklahoma City suburb of Moore. The "Tri-State Tornado" killed 695 people and injured 2,027, traveling more than 300 miles.