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

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