Lafayette, Tenn. - Residents in five Southern states tried to salvage what they could Wednesday from homes reduced to piles of debris, a day after the deadliest cluster of tornadoes in nearly a decade tore through the region, snapping trees and crumpling homes. At least 55 people were dead.

Rescue crews, some with the help of the National Guard, went door-to-door looking for more victims. Dozens of twisters were reported as the storms swept through Kentucky, Tennessee, Mississippi, Arkansas and Alabama.

Seavia Dixon, whose Atkins, Ark., home was shattered, stood Wednesday morning in her yard, holding muddy baby pictures of her son, who is now a 20-year-old soldier in Iraq. Only a concrete slab was left from the home.

The family's brand new white pickup truck was upside-down, about 150 yards from where it was parked before the storm. Another pickup truck the family owned sat crumpled about 50 feet from the slab.

"You know, it's just material things," Dixon said, her voice breaking. "We can replace them. We were just lucky to survive."

In many places, the storms struck as Super Tuesday primaries were ending. As the extent of the damage quickly became clear, Hillary Rodham Clinton, Barack Obama and Mike Huckabee paused in their victory speeches to remember the victims.

Twenty-six people were killed in Tennessee, 13 killed in Arkansas, seven killed in Kentucky and four killed in Alabama, emergency officials said. Among the victims were Arkansas parents who died with their 11-year-old daughter in Atkins when they stayed behind to calm their horses. The community, one of the hardest hit, is a town of about 3,000 approximately 60 miles northwest of Little Rock.

Ray Story tried to get his 70-year-old brother, Bill Clark, to a hospital after the storms leveled his mobile home in Macon County, about 60 miles northeast of Nashville. Clark died as Story and his wife tried to navigate debris-strewn roads in their pickup truck, they said.

"He never had a chance," Story's wife, Nova, said. "I looked him right in the eye and he died right there in front of me."

President Bush said he called the governors of Alabama, Arkansas, Kentucky, Mississippi and Tennessee and assured them the administration was ready to help and to deal with any emergency requests.

"Loss of life, loss of property - prayers can help and so can the government," Bush said. "I do want the people in those states to know the American people are standing with them."

The system moved eastward to Alabama Wednesday, bringing heavy rain and gusty wind, causing several injuries in counties northwest of Birmingham. The National Weather Service posted tornado watches for parts of southern Alabama, the Florida Panhandle and western Georgia, but the storms appeared to weaken as they approached the coast. Weather service experts also investigated damage in Indiana to see if it was caused by tornadoes.

An apparent tornado damaged eight homes in Walker County, Ala., and a pregnant woman suffered a broken arm when a trailer home was tossed by the wind, said county emergency management director Johnny Burnette.

"I was there before daylight and it looked like a war zone," he said.

Northeast of Nashville, a spectacular fire erupted at a natural gas pumping station. The station took a direct hit from the storm, but no deaths connected to the fire were reported.

About 200 yards from the edge of the plant, Bonnie and Frank Brawner picked through the rubble of their home for photographs and other personal items. The storm sheared off the second story of the home.

"We had a beautiful neighborhood, now it's hell," said Bonnie Brawner, 80.

More than 20 students were stuck behind wreckage and jammed doors, mostly for short periods, in battered dormitories at Union University in Jackson, Tenn. Tornadoes had hit the campus in the past, and students knew the drill when they heard sirens, said Union University President David S. Dockery.

"When the sirens went off the entire process went into place quickly," Dockery said. Students "were ushered into rooms, into the bathrooms, interior spaces."

He said about 50 students were taken to a hospital and nine stayed through the night. But all would be fine, he said. The students "demonstrated who they are and I'm so proud of them."

In Memphis, high wind collapsed the roof of a Sears store at a mall. Debris that included bricks and air conditioning units was scattered on the parking lot, where about two dozen vehicles were damaged.

A few people north of the mall took shelter under a bridge and were washed away in the Wolf River, but they were pulled out with only scrapes, said Steve Cole of the Memphis Police Department.

Winter tornadoes are not uncommon. The peak tornado season is late winter through midsummer, but the storms can happen at any time of the year with the right conditions.

But this batch was the nation's worst in a 24-hour period since May 3, 1999, when some 50 people died in Oklahoma and Kansas. The death toll ranks among the top 15 from tornado outbreaks since 1950, said Greg Carbin, the warning coordination meteorologist at the center in Norman, Okla., just south of Oklahoma City.

The tornadoes could be due to La Nina, the cooling of the tropical Pacific Ocean that can cause changes in weather patterns around the world. It is the opposite of the better-known El Nino, a periodic warming of the same region.

Recent studies have found an increase in tornadoes in parts of the southern U.S. during the winter during a La Nina. On Jan. 8, tornadoes were reported in Arkansas, Illinois, Missouri, Oklahoma and Wisconsin. Two died in the Missouri storms.

In this round of storms, there were 67 eyewitness accounts of tornadoes but the number of twisters likely won't be that high because some probably saw the same funnel cloud, said Carbin. He said a reasonable guess is that 30 to 40 tornadoes touched down.

Most communities had ample warning that the storms were coming - forecasts had warned for days severe weather was possible. But in at least one rural community, there was no siren to alert residents the severe weather had arrived.

In Kentucky's Allen County, officials have requested funding for a siren at the fire station, but don't have one yet. Even if they did, officials wondered if it would have helped.

"It came in quick," Judge-Executive Bobby Young said. "Probably, warning devices wouldn't have helped any."

Earlier story:

Atkins, Arkansas - Authorities went door-to-door trying to find additional victims of tornadoes that killed at least 26 people, ripped the roof off a shopping mall and blew apart warehouses as they tore across four states.

The dead included 12 people in Tennessee, 11 in Arkansas, and a mother and father who died in Kentucky with their adult daughter. Those killed in Arkansas included another set of parents, who died with their 11-year-old in Atkins, about 60 miles northwest of Little Rock.

The family died from trauma when the storm their home "took a direct hit" from the storm, Pope County Coroner Leonard Krout said.

"Neighbors and friends who were there said, 'There used to be a home there,'" Krout said.

The twisters, which also slammed Mississippi, were part of a line of storms that raged across the nation's midsection at the end of the Super Tuesday primaries in several states. As the extent of the damage quickly became clear, candidates including Hillary Rodham Clinton, Barack Obama and Mike Huckabee paused in their victory speeches to remember the victims.

Northeast of Nashville, Tenn., a spectacular fire erupted at a natural gas pumping station northeast of Nashville that authorities said could have been damaged by the storms. An undetermined number of people were reported dead.

Eight students were trapped in a battered dormitory at Union University in Jackson, Tenn., until they were finally freed.

Well after nightfall Tuesday, would-be rescuers went through shattered homes in Atkins, a town of 3,000 near the Arkansas River. Around them, power lines snaked along streets and a deep-orange pickup truck rested on its side. A navy blue Mustang with a demolished front end was marked with spray paint to show it had been searched.

Outside one damaged home, horses whinnied in the darkness, looking up only when a flashlight reached their eyes. A ranch home stood unscathed across the street from a concrete slab that had supported the house where the family of three died.

Gov. Mike Beebe planned to tour Atkins on Wednesday.

In Memphis, high winds collapsed the roof of a Sears store at a mall. Debris that included bricks and air conditioning units was scattered on the parking lot, where about two dozen vehicles were damaged.

A few people north of the mall took shelter under a bridge and were washed away, but they were pulled out of the Wolf River with only scrapes, said Steve Cole of the Memphis Police Department.

In Mississippi, Desoto County Sheriff's Department Cmdr. Steve Atkinson said a twister shredded warehouses in an industrial park in the city of Southaven, just south of Memphis.

"It ripped the warehouses apart. The best way to describe it is it looks like a bomb went off," Atkinson said.

The power was knocked out briefly at a Little Rock convention hall that hosted a watch party for Huckabee, a former Arkansas governor seeking the GOP nomination for president.

"While we hope tonight is a time for us to celebrate election results, we are reminded that nothing is as important as the lives of these fellow Arkansans, and our hearts go out to their families," Huckabee said.

At the W.J. Matthews Civic Center in Atkins, a shelter was empty except for American Red Cross volunteers and a single touch-screen voting machine. The civic center had hosted an election precinct earlier Tuesday. Traffic was snarled on nearby Interstate 40, with tractor-trailers on their sides.

Officials do not know what started a fire at the Columbia Gulf Natural Gas pumping station near Green Grove, about 40 miles from Nashville. The blaze could be seen in the night sky for miles around, with flames shooting "400, 500 feet in the air," said Tennessee Emergency Management spokesman Donnie Smith.

The couple killed with their adult daughter were in their mobile home near Greenville in western Kentucky when a tornado went through their trailer park.

On Jan. 8, tornadoes were reported in Arkansas, Illinois, Missouri, Oklahoma and Wisconsin. Two died in the Missouri storms.

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