SHAWNEE, OK (CBSNews.com) -A second death was attributed to a tornado which struck central Oklahoma on Sunday.
It was one of several twisters created by a storm system that sweptthrough the nation's midsection Sunday, with damage concentrated incentral Oklahoma and Wichita, Kan.
Twenty-one injuries were reported.
On Monday spokeswoman Amy Elliot of the Oklahoma state medicalexaminer's office identified the two people confirmed dead from Sunday'sstorms as 79-year-old Glen Irish and 76-year-old Billy Hutchinson. Bothmen were from Shawnee.
Tornadoes were reported Sunday in Iowa, Kansas and Oklahoma as partof a storm system that stretched from Texas to Minnesota. Oklahoma'sgovernor has declared a state of emergency in 16 counties across thestate.
The powerful system spawned baseball-sized hail, and winds strongenough to flip over tractor trailers, littering them across a majorinterstate, reports correspondent Anna Werner.
And this area isn't in the clear just yet. More severe weather is expected.
CBS Station WFOR meteorologist Jeff Berardelli said the biggestthreat Monday is in northern Oklahoma into northern Arkansas and alsosouthern parts of Missouri, as the system moves east over the nextcouple of days.
The worst of the damage Sunday appeared to be at the Steelman EstatesMobile Home Park located amid gently rolling hills about 35 milessoutheast of Oklahoma City.
"It took a dead hit," resident James Hoke said. Emerging from a stormcellar where he sought refuge with his wife and two children, Hokefound that their mobile home had vanished. "Everything is gone."
Hoke said he started trying to help neighbors and found his wife's father covered in rubble.
"My father-in-law was buried under the house. We had to pull Sheetrock off of him," Hoke said.
Forecastershad been warning of bad weather since last Wednesday and on Sunday saidconditions had ripened for powerful tornadoes. Wall-to-wall broadcastsof storm information spread the word Sunday, leaving Pottawatomie CountySheriff Mike Booth grateful.
"There was a possibility alot more people could have been injured," Booth said. "This is the worstI've seen in Pottawatomie County in my 25 years of law enforcement."
Hearingon the radio that a violent storm was approaching her rural Oklahomaneighborhood, Lindsay Carter took advantage of the advanced warning,gathered her belongings and fled. When she returned, there was littleleft of the community she called home.
She had heard on a radio broadcast that a storm that had originated southwest of Oklahoma City was headed toward Shawnee.
"Wegot in the truck and left," Carter said. With upward of 30 minutes'notice for Pottawatomie County, Carter had time to leave one of the fewframe homes in Steelman Estates and most of her house was intact whenshe returned.
"I walked up, and the house was OK. Part of the roof was gone," she said.
The scene was different a short distance away.
"Trees were all gone. I walked further down and all those houses were gone," she said.
Boothsaid a 79-year-old man was found dead out in the open at SteelmanEstates, but the sheriff didn't have details on where he had lived.
"Youcan see where there's absolutely nothing, then there are places whereyou have mobile home frames on top of each other, debris piled up,"Booth said. "It looks like there's been heavy equipment in there on ademolition tour.
"It's pretty bad. It's pretty much wiped out," he said.
Following the Oklahoma twisters, local emergency officials went fromhome site to home site in an effort to account for everyone. Keli Cain, aspokeswoman for the Oklahoma Department of Emergency Management, saidthat, many times in such situations, people who are not foundimmediately are discovered later to have left the area ahead of thestorm.
A storm spotter told the National Weather Servicethat the tornado left the earth "scoured" at the mobile home park. Atthe nearby intersection of Interstate 40 and U.S. 177, a half-dozentractor-trailers were blown over, closing both highways for a time.
"Itseemed like it went on forever. It was a big rumbling for a long time,"said Shawn Savory, standing outside his damaged remodeling business inShawnee. "It was close enough that you could feel like you could reachout and touch it."
Gov. Mary Fallin declared an emergency for 16Oklahoma counties that suffered from severe storms and flooding duringthe weekend. The declaration lets local governments acquire goodsquickly to respond to their residents' needs and puts the state in linefor federal help if it becomes necessary.
Heavy rains and straight-line winds hit much of western Oklahoma onSaturday. Tornadoes were also reported Sunday at Edmond, Arcadia andnear Wellston to the north and northeast of Oklahoma City. The supercellthat generated the twisters weakened as it approached Tulsa, 90 milesto the northeast.
"I knew it was coming," said RandyGrau, who huddled with his wife and two young sons in their Edmondhome's safe room when the tornado hit. He said he peered out his windowas the weather worsened and believed he saw a flock of birds headingdown the street.
"Then I realized it was swirling debris. That's when we shut the doorof the safe room," said Grau, adding that they remained in the room for10 minutes.
In Wichita, Kan., a tornado touched downnear Mid-Content Airport on the city's southwest side shortly before 4p.m., knocking out power to thousands of homes and businesses butbypassing the most populated areas of Kansas' biggest city. The Wichitatornado was an EF1 on the enhanced Fujita scale, with winds of 110 mph,according to the weather service.
Sedgwick County Emergency Management Director Randy Duncan said there were no reports of fatalities or injuries in Kansas.
Therewere also two reports of tornadoes touching down in Iowa on Sundaynight, including one near Huxley, about 20 miles north of Des Moines,and one in Grundy County, which is northeast of Des Moines, according tothe Des Moines Register. Six mobile homes in Earlham were damaged.Downed power lines have left about 11,000 homes and business withoutpower across the state.
Semitrailers blew over west of Earlham and on Interstate Highway 35 near Ankeny.
InOklahoma, aerial television news footage showed homes with significantdamage northeast of Oklahoma City. Some outbuildings appeared to havebeen leveled, and some homes' roofs or walls had been knocked down.
In Katie Leathers' backyard in Edmond, the family's trampoline was tossed through a section of fence and a giant tree uprooted.
"Isaw all the trees waving, and that's when I grabbed everyone and gotinto two closets," Leathers said. "All these trees just snapped."