PICHER, Okla. -- Crews and search dogs have been looking for survivors or bodies in piles of debris after storms including tornadoes killed at least 21 people in three states.

Six people died in Picher, Okla., a once-bustling mining town of 20,000 that had fallen to about 800 as families fled lead pollution. The town was flattened, but the governor said he doesn't think there'll be any more deaths as a result of the storm. Emergency officials had at first reported seven dead there.

The same storm system then moved into southwestern Missouri, where at least 14 people were killed, 10 of them killed when a twister hit near the town of Seneca.

Sunday, storms in Georgia killed at least one person.

President George W. Bush said he'll be in touch with the governors and offer federal help.

Georgia Power officials said at least 80,000 residents were without electricity across the state Sunday morning, mostly concentrated in the metro Atlanta area and the Macon area.

The National Weather Service said a strong storm system carrying a funnel cloud moved over central Ohio, and authorities are investigating reports that a tornado touched down west of Columbus.

Bush said he plans to be in touch with the governors of the affected states.

Meanwhile, the search for possible victims buried in rubble from the twister that spun across the Oklahoma-Missouri border continued Sunday morning.

Oklahoma Gov. Brad Henry will visit the area around Picher Sunday after tornadoes raked the area.

On Saturday, Henry issued a statement saying the state's "thoughts and prayers are with the people of Picher and all of the other Oklahoma communities" hit by storms.

The National Weather Service estimated that at least eight tornadoes had been spawned in Oklahoma along six storm tracks. Three teams were dispatched to assess damage, determine exactly how many separate tornadoes had touched down and assign each one a rating, meteorologist Steve Amburn said.

Several people are missing and dozens of people are reported hurt, some seriously. An Oklahoma Highway Patrol lieutenant said some homes were leveled down to the foundation. A county emergency official said it looks like a bomb went off.

Saturday's tornado tore up a 20-block swath of the depressed mining town. It had already been designated a federal superfund site due to lead pollution, and over the years, many townspeople have taken federal buyouts and pulled up stakes.

The death toll in Oklahoma could climb, said state Emergency Management spokeswoman Michelann Ooten.

"I know they are going through the rubble, trying to find people missing," she said. "There are numerous injuries."

Other tornadoes were reported near McAlester and Haywood in Pittsburg County and in rural Pushmataha County, both in southeastern Oklahoma.

Television footage showed some destroyed outbuildings and damaged homes west of McAlester and near Haywood. At a glass plant southwest of McAlester, the storm apparently picked up a trailer and slammed it down on garbage bins.

In storm-weary Arkansas, a tornado collapsed a home and a business, and there are reports of a few people being trapped in buildings.

One official said it seems like the past two years have seen constant storms, "just one right after another."

Central Park Elementary School in the northwest Arkansas city of Bentonville had roof and window damage, and damage was also reported at Pine Creek Center School.

The storms remained active into the evening as they swept eastward, with watches and warnings abundant across a wide swath of the Plains and South.

Rescuers freed a man trapped in his vehicle in western Tennessee after a tree fell on it during thunderstorms, Memphis firefighters said.

Memphis authorities say they've received reports of power lines and trees down, but there have been no injuries.

Tornadoes killed 13 people in Arkansas on Feb. 5, and another seven were killed in an outbreak May 2. In between was freezing weather, persistent rain and river flooding that damaged residences and has slowed farmers in their planting.

Last week, a tornado killed one person and injured three others when it set down about six miles from Greensboro, N.C., and another twister in Tupelo, Miss., damaged a shopping mall and downed power lines.