Rescuers search through rubble in Shawnee, Oklahoma, on Monday, May 20. A tornado outbreak hit in the Midwest and Plains on Sunday and Monday, the deadliest hitting Moore, Oklahoma, on Monday.
Tornadoes wreak havoc in Midwest —
Rescuers search through rubble in Shawnee, Oklahoma, on Monday, May 20. A tornado outbreak hit in the Midwest and Plains on Sunday and Monday, the deadliest hitting Moore, Oklahoma, on Monday.
XINHUA /LANDOV
Massive piles of debris cover the ground after a powerful tornado ripped through Moore, Oklahoma, on May 20. <a href="http://www.cnn.com/2013/05/20/us/gallery/moore-oklahoma-tornado/index.html">View photos related to the Moore tornado.</a>
Tornadoes wreak havoc in Midwest —
Massive piles of debris cover the ground after a powerful tornado ripped through Moore, Oklahoma, on May 20. View photos related to the Moore tornado.
Brett Deering/Getty Images
A deadly tornado destroys cars and demolishes structures in the town of Moore, near Oklahoma City, on Monday, May 20.
Tornadoes wreak havoc in Midwest —
A deadly tornado destroys cars and demolishes structures in the town of Moore, near Oklahoma City, on Monday, May 20.
Richard Rowe/Reuters/Landov
A volunteer helps clean up a mobile home on May 20 after it was overturned on a day earlier near Shawnee, Oklahoma.
Tornadoes wreak havoc in Midwest —
A volunteer helps clean up a mobile home on May 20 after it was overturned on a day earlier near Shawnee, Oklahoma.
Brett Deering/Getty Images
Jean McAdams' mobile home near Shawnee, Oklahoma, lies overturned on May 20.
Tornadoes wreak havoc in Midwest —
Jean McAdams' mobile home near Shawnee, Oklahoma, lies overturned on May 20.
Brett Deering/Getty Images
President Barack Obama talks on the phone with Oklahoma Gov. Mary Fallin from the Oval Office on May 20. The president expressed his concern for those who have been affected by the severe weather.
Tornadoes wreak havoc in Midwest —
President Barack Obama talks on the phone with Oklahoma Gov. Mary Fallin from the Oval Office on May 20. The president expressed his concern for those who have been affected by the severe weather.
Pete Souza/White House Photo
Tom and Ronda Clark get help with cleanup on May 20, after their property near Shawnee was damaged by a tornado on May 19.
Tornadoes wreak havoc in Midwest —
Tom and Ronda Clark get help with cleanup on May 20, after their property near Shawnee was damaged by a tornado on May 19.
Brett Deering/Getty Images)
Lonnie Langston says his garage was swept off the concrete pad next to his house by a tornado near Shawnee.
Tornadoes wreak havoc in Midwest —
Lonnie Langston says his garage was swept off the concrete pad next to his house by a tornado near Shawnee.
Brett Deering/Getty Images
Shawnee residents embrace on May 20 as they search through the remains of their home.
Tornadoes wreak havoc in Midwest —
Shawnee residents embrace on May 20 as they search through the remains of their home.
BILL WAUGH/Reuters/LANDOV
A home in Shawnee sits in ruin after being hit by a tornado on Sunday, May 19.
Tornadoes wreak havoc in Midwest —
A home in Shawnee sits in ruin after being hit by a tornado on Sunday, May 19.
MARCUS DIPAOLA/Xinhua /Landov
A twister stretches toward the ground near South Haven, Kansas, on May 19.
Tornadoes wreak havoc in Midwest —
A twister stretches toward the ground near South Haven, Kansas, on May 19.
GENE BLEVINS/Reuters/Landov
Residents repair the roof of a neighbor's damaged house after a tree fell on it in Shawnee on May 19.
Tornadoes wreak havoc in Midwest —
Residents repair the roof of a neighbor's damaged house after a tree fell on it in Shawnee on May 19.
GENE BLEVINS/Reuters/Landov
A woman waits to be allowed back to her home after a tornado swept through Shawnee on May 19.
Tornadoes wreak havoc in Midwest —
A woman waits to be allowed back to her home after a tornado swept through Shawnee on May 19.
BILL WAUGH/Reuters/Landov
Storm chaser and videographer Brad Mack records a tornado touchdown in South Haven, Kansas, on May 19.
Tornadoes wreak havoc in Midwest —
Storm chaser and videographer Brad Mack records a tornado touchdown in South Haven, Kansas, on May 19.
GENE BLEVINS/Reuters/Landov
A tractor-trailer lies on its side on Interstate 40 while another is broken open on the road below after falling from the overpass after a tornado strike near Highway 177 north of Shawnee on May 19.
Tornadoes wreak havoc in Midwest —
A tractor-trailer lies on its side on Interstate 40 while another is broken open on the road below after falling from the overpass after a tornado strike near Highway 177 north of Shawnee on May 19.
BILL WAUGH/Reuters/Landov
A tornado touches down near Wichita, Kansas, on Sunday, May 19.
Tornadoes wreak havoc in Midwest —
A tornado touches down near Wichita, Kansas, on Sunday, May 19.
Travis Heying/Wichita Eagle/MCT/landov
Debris from a mobile home park west of Shawnee litters the ground on May 19. An estimated 300 homes were damaged or destroyed across Oklahoma, Red Cross spokesman Ken Garcia said.
Tornadoes wreak havoc in Midwest —
Debris from a mobile home park west of Shawnee litters the ground on May 19. An estimated 300 homes were damaged or destroyed across Oklahoma, Red Cross spokesman Ken Garcia said.
BILL WAUGH/Reuters/Landov
Lightning strikes in Clearwater, Kansas, on May 19.
Tornadoes wreak havoc in Midwest —
Lightning strikes in Clearwater, Kansas, on May 19.
GENE BLEVINS/Reuters/Landov