A large storm cell, which produced a multiple-vortex tornado, passes south of El Reno, Okla., on May 31.
Lindsay Welton, left, and Dana Givens salvage what they can from a relative's home on June 2, 2013, in El Reno, Okla.
Millie Wade cleans up what she can in what was the living room of her son's home on June 2, after it was destroyed by a tornado in El Reno, Okla.
Flash flooding leaves a massive sinkhole on Route 62, June 2, in Oklahoma City.
Conni Grulkey, left, and Heather Murray sit with a lost dog, June 2, 2013, as they search for the owner in El Reno, Okla., after a tornado passed through the area.
Derick Holman hugs Charlene Wilford, right, after they spent a long day June 1 helping salvage items from a home in El Reno, Okla.
Mark Reynolds looks through debris to find personal items on June 1, after a series of tornadoes that ripped through the area a day earlier in El Reno, Okla.
Metal siding hangs from a tree on June 1, in El Reno, Okla.
Tornado-destroyed homes are seen in Union City, Okla., on June 1.
People look for salvageable items on June 1, after a storm demolished a house on Haversham Drive in St. Charles County, Mo.
A boy looks over a heavily damaged home in Union City, Okla., on June 1.
A Salvation Army worker prays with Richard and Debbie Pounds in front of their damaged home in El Reno, Okla., June 1.
Linda Elston carries items out of the family RV on June 1 after it was overturned by a tornado at a state shooting tournament in El Reno, Okla.
Bill Thesing salvages some of his belongings in a field on June 1, 2013 in El Reno, Okla.
Bill Thesing, left, who was injured in his home when a tornado hit, returns from the hospital to salvage items from his damaged homse as his friend Tammy Hicks helps on June 1, in El Reno, Okla.
Holly Mais, left, Josh Hill, Dylan Lager and Forrest Champion carry an injured dog out of a home damaged by the passing tornado on June 1, 2013 in El Reno, Okla.
People watch as the Canadian River floodwater is released at the Lake Overholser Dam in Oklahoma City on June 1.
Men move a damaged guardrail from flood waters across Banner Road at Route 66 near El Reno, Okla., on June 1. A massive storm with tornadoes and flooding rain roared through the area the previous day causing widespread damage.
People survey the damage at the at Canadian Valley Technology Center's El Reno Campus, June 1, after it was hit by a powerful tornado in El Reno, Okla., the day before.
Cary Dehart photographs tornado damage at Canadian Valley Technology Center's Aviation Technology building in El Reno, Okla., June 1.
Ashley Slinkard, left, embraces Becky Brady as they look over the destroyed home of Brady's daughter on June 1 after a overnight storm in St. Charles, Mo. Emergency officials set out Saturday morning to see how much damage a violent burst of thunderstorms and tornadoes caused as it swept across the Midwest overnight.
Wilburn Shaw looks for personal items in the remains of his kitchen in his home on June 1 after a storm that passed through area in St. Charles, Mo.
Kristi Clausen helps salvage clothing from her neighbor's destroyed house on June 1 in St. Charles, Mo.
Cars and trees damaged by a tornado are seen at Canadian Valley Technology Center in El Reno, Okla., on June 1.
Ron Ulloa looks over his damaged business at I-40 in El Reno, Okla. on June 1.
A man stands on top of his flooded car in Oklahoma City, May 31, following flooding after a severe thunderstorm moved through the area.
Lightning from a tornadic thunderstorm strikes in Perry, Okla., on May 31. Violent thunderstorms produced tornadoes in central Oklahoma that killed several people and menaced Oklahoma City and its hard-hit suburb of Moore.
Lisa Ludlam holds her children, Jake, 6, Paige, 9, and Tony, 11, under the Cox Convention Center after fans at the Barons game were evacuated to the parking garage under the building due to severe storms in Oklahoma City on May 31. Emergency officials set out Saturday morning to see how much damage a violent burst of thunderstorms and tornadoes caused as it swept across the Midwest overnight, killing at least nine and injuring dozens.
Tornado debris and downed power lines are seen on I-40 as traffic slowly passes just east of El Reno, Okla.
Oklahoma Highway Patrol troopers look at a flipped SUV, which was blown off I-40 by a tornado, just east of El Reno, Okla.
Parts of Oklahoma City experienced flooding after multiple tornadoes passed through on May 31. The violent storm formed over the prairie west of Oklahoma City late Friday afternoon, dropped tornadoes into suburbs and rolled over the state capital.
An overturned semitrailer rests on its side on the eastbound lanes of I-40, just east of El Reno after a tornado touched down on May 31.
Large clouds are seen as a tornado passes south of El Reno, Okla., on May 31, 2013. Violent thunderstorms spawned tornadoes that menaced Oklahoma City and its already hard-hit suburb of Moore. A mother and her baby were killed when their SUV was blown off Interstate 40, and officials worried that other drivers stuck on freeways could be trapped in the twisters' path.