Deadly U.S. Tornadoes

Raella Faulkner, at left, and Bobby McElroy survey what's left of their home, April 28, 2014, after a tornado struck the town of Vilonia, Arkansas late Sunday.

Elquin Gonzalez, owner of the Texaco gas station on North Gloster Street in Tupelo, Mississippi, begins cleaning up his business after a tornado touched down, April 28, 2014.

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Deanna Locke, 17, and her siblings including, from left, Charlotte, Drew, and Trinity examine a downed tree across the street from their home in Tupelo, Mississippi, after a suspected tornado moved through town, April 28, 2014.

Connie Krehel looks through debris after her home was hit by a tornado, April 28, 2014, in Vilonia, Arkansas.

Tornado damage is surveyed in Quapaw, Oklahoma, April 28, 2014.

Sherry Lee hugs her brother-in-law Andy Lee, April 28, 2013 after a tornado destroyed her home Sunday on Cemetery Street in Vilonia, Arkansas.

Piles of debris is all that's left to homes located off Cemetery Street in Vilonia, Arkansas, after a tornado struck the town, April 28, 2014.

A tornado-damaged home awaits cleanup and repairs after a tornado hit the region, Baxter Springs, Kansas, April 28, 2014.

An electricity distribution tower was toppled over after a tornado system ripped through several states, near Mayflower, Arkansas, April 28, 2014.

A row of lightly damages houses, top, face a row of destroyed homes after a tornado struck the town killing at least 16 people, Vilonia, Arkansas, April 28, 2014.

A travel trailer was thrown on its side after a tornado struck, Mayflower, Arkansas, April 28, 2014.

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Tornadoes ripped through the south-central United States killing at least 12 people in Arkansas and Oklahoma, leaving a trail of debris, Mayflower, Arkansas, April 27, 2014.

A thunderstorm supercell passes over the area with the potential of becoming a tornado, Hampton, Arkansas, April 24, 2014.