( CNN ) -- At least five people were killed in Oklahoma on Monday after a severe storm system spawned multiple tornadoes across the state , the state emergency management department said . Three people died in Cleveland County , just west of Tecumseh , Oklahoma , said Albert Ashwood , director of the state emergency management department , and another was reported dead near Choctaw , east of Oklahoma City , Oklahoma . The location in Oklahoma of the fifth person who died was unknown late Monday night . Brenda Finkle , director of corporate communications for Norman Regional Health System , said the company 's hospital in Norman admitted eight patients Monday night in critical condition with crush injuries and head trauma . At least 25 other people filled the waiting room of Norman Regional Hospital with lacerations and head wounds , Finkle said , adding hospital staff expected more patients to continue to seek treatment . Another 20 people were either getting medical care or awaiting treatment at Moore Medical Center , just north of Norman , according to Finkle . OU Medical Center in Oklahoma City , Oklahoma , received two patients with broken bones , according to spokesman Allen Poston . The Oklahoma Department of Emergency Management reported seven injuries . Video out of Norman showed overturned cars , snapped utility poles , downed trees and severely damaged homes . Several mobile homes were blown to pieces in one neighborhood where debris littered yards and streets alongside large trees ripped straight from the ground . A truck stop east of Oklahoma City was demolished , taking a direct hit from one of the tornadoes , according to a spokeswoman for Love 's Travel Stops and Country Stores . Motorists pulled off Interstate 40 and sought shelter in the truck stop 's large coolers and restrooms before the tornado tore the roof off the building , blew out car windows and overturned tractor-trailers , spokeswoman Christina Dukeman said . Video showed people outside the truck stop receiving treatment for minor injuries . Laura O'Leary , a spokeswoman for the Emergency Medical Services Authority , said seven people were transported from around the immediate area to local hospitals in good and fair condition , `` a miraculously low number ... considering the volume of area the tornado covered . '' Love 's employee Charlescie Greenway said she and two other women made it to one cooler before the twister tore through the building . `` The three of us were kind of trapped in there , holding the door shut , praying to God that we do n't die and that everybody else was safe , '' Greenway told CNN affiliate KWTV , adding , `` it was really scary -- the wind was like trying to pull the door off the latch . '' Sammy Ward and his partner rode the twister out in their truck in the parking lot . `` It started hailing and then it quit hailing and then all of a sudden the wind hit and it just went dark and here went everything , '' Ward told KWTV . `` Trucks went to rocking ... and next thing we know the whole roof and everything was gone . '' Ward , who said he felt `` very lucky , '' said the event lasted two to three minutes . Ashwood said crews were working to assess the damages in at least 13 counties , adding `` numerous '' homes had been affected . Are you there ? Send photos , video . The American Red Cross opened at least two shelters in McCloud , Oklahoma , and Tecumseh , Oklahoma , and continued to assess needs across the state . More than 31,000 homes were without power in the metro Oklahoma City area -- nearly 15,000 in Norman alone , according to Oklahoma Gas & Electric . Ashwood said preliminary reports out of Norman indicate the damages are `` similar to what you would see with an EF3 '' tornado , referring to the Enhanced Fujita Scale for measuring the strength of tornadoes . An EF3 is capable of producing winds up to 165 mph . CNN iReporter Rebecca Barbato said tornado sirens were going off in her neighborhood in Moore , just north of Norman , when tennis-ball-sized hail began raining down on her roof . Other tornadoes were reported in Yukon , Medford and Shawnee in Oklahoma , and in Wichita , Kansas . The storms struck around 5 p.m. CT ( 6 p.m . ET ) . Meteorologists warned throughout the day Monday of the potential for tornadoes . CNN 's Devon Sayers and Sarah Aarthun contributed to this report .
NEW : At least five killed in Oklahoma . American Red Cross opens up at least two shelters . Truck stop on Interstate 40 east of Oklahoma City destroyed by twister . Comment: