In Henryville, Ind., on Sunday, Janet Clark stood outside what remains of her home, which was destroyed in Friday's tornado. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images

The areas inside the red lines are where tornadoes were being reported at 11:36 a.m. ET. National Weather Service hide caption

itoggle caption National Weather Service

A cross stood atop a church that was severely damaged by a tornado Sunday in Joplin, Mo., as a severe storm passed overhead earlier today (May 23, 2011). Charlie Riedel/AP hide caption

itoggle caption Charlie Riedel/AP

Homeowner Marilyn Latham stood in the wreckage of her devastated home in the Alberta City community of Tuscaloosa, Ala., on Saturday (May 7, 2011). Dave Martin/AP hide caption

itoggle caption Dave Martin/AP

Residents survey the destruction after a tornado hit Pratt City, Ala. just north of downtown Birmingham, Ala. on Wednesday, April 27, 2011. Butch Dill/AP hide caption

itoggle caption Butch Dill/AP