Aerial views of tornado damage

In this aerial photo, several homes lie demolished, Saturday, March 3, 2012, in Marysville, Ind., after a tornado swept through the town Friday. s.

In this aerial photo, a school bus lies on its side Saturday, March 3, 2012, in Henryville, Indiana, after a tornado swept through the town Friday.

In this aerial photo, Homes lie damaged Saturday, March 3, 2012, in Moscow, Ohio, after a tornado swept through the area Friday.

In this aerial photo, a school is shown damaged Saturday, March 3, 2012, in Henryville, Ind. ,after a tornado swept through the town Friday.

AP Photo/The Cincinnati Enquirer, Gary Landers

An aerial view of destruction in Campbell County Ky. is seen Saturday morning March, 3, 2012. Emergency crews desperately search for survivors Saturday after a violent wave of Midwest and Southern storms flattened some rural communities and left behind a trail of destruction: shredded homes, downed power lines and streets littered with tossed cars.

In this aerial photo, homes lie demolished Saturday, March 3, 2012, along the Ohio River in Moscow, Ohio, after a tornado swept through the town Friday.

Massive thunderstorms threw off dozens of tornadoes from the Gulf Coast to the Great Lakes on Friday, killing at least 35 people. Twisters crushed blocks of homes, knocked out cellphones and landlines, ripped power lines from broken poles, and tossed cars, school buses and tractor-trailers onto roads made impassable by debris.

Gary Landers,AP Photo/The Cincinnati Enquirer

This Saturday morning, March, 3, 2012 aerial view shows destruction in the Village of Moscow, Ohio. Violent storms spawned tornadoes throughout Indiana, northern Kentucky, and southwest Ohio Friday evening.

In this aerial photo, homes and businesses lie damaged, Saturday, March 3, 2012, in Henryville, Ind., after a tornado swept through the town Friday.

In this aerial photo, a school is shown damaged, Saturday, March 3, 2012, in Henryville, Ind. after a tornado swept through the town Friday.

In this aerial photo, several homes lie demolished, Saturday, March 3, 2012, in Marysville, Ind., after a tornado swept through the town Friday.

In this aerial photo, a home lies demolished, Saturday, March 3, 2012, near Marysville, Indiana, after a tornado swept through the area Friday.

In this aerial photo, people inspect a demolished home Saturday, March 3, 2012, in Holton, Indiana, after a tornado swept through the town Friday.

In this aerial photo, trees are bent over near a damaged house, Saturday, March 3, 2012, in Henryville, Ind., after a tornado swept through the town Friday.

In this aerial photo, a home lies demolished next to a home virtually untouched, Saturday, March 3, 2012, in Marysville, Indiana, after a tornado swept through the town Friday.

In this aerial photo, debris is strewn about, Saturday, March 3, 2012, in Marysville, Indiana, after a tornado swept through the area Friday.

In this aerial photo, homes lie destroyed Saturday, March 3, 2012, along the Ohio River in Moscow, Ohio, by a tornado that hit the town Friday, narrowly missing the Zimmer power station shown at top.

A damaged school is shown Saturday, March 3, 2012, in Henryville, Ind., after a tornado swept through the town Friday. A string of violent storms demolished small towns in Indiana and cut off rural communities in Kentucky.

This Thursday, March 1, 2012 satellite image provided by GeoEye shows the path of a tornado, diagonal from bottom left to upper right, which struck Harrisburg, Ill. The twister killed six people before dawn Wednesday, Feb. 29, 2012.

This aerial photo shows a path of damage stretching west from the backside of a Wal-Mart Supercenter to the east in Harrisburg, Ill., after a severe storm hit Wednesday, Feb. 29, 2012. Several deaths have been reported in Harrisburg and left the city's medical center scrambling to treat an influx of injured, the hospital's top administrator said.

This aerial photo shows damaged homes near the corner of South Water and Birch Streets in Harrisburg, Ill., after a severe storm hit Wednesday, Feb. 29, 2012. Several deaths have been reported in Harrisburg and left the city's medical center scrambling to treat an influx of injured, the hospital's top administrator said.

In this aerial photo, people inspect a demolished home Saturday, March 3, 2012, near Henryville, Ind., after a tornado swept through the town Friday.