Woodward , Oklahoma ( CNN ) -- The death toll from a weekend tornado in Woodward , Oklahoma rose to six Monday with the death of a critically injured man in the hospital , a city official said . The man , whose name has not been released , died at a hospital in Amarillo , Texas , about 160 miles away , Woodward emergency manager Matt Lehenbauer said . His wife remains hospitalized in critical condition , Lehenbauer said . The storm struck after midnight Sunday , taking aim at the Hidden Valley Mobile Home Park in Woodward , killing Frank Hobbie and his two young daughters , ages 5 and 7 . Two other victims , Derrin Juul and a 10-year-old girl presumed to be Juul 's daughter , died when powerful winds rolled their car several times , Woodward Mayor Roscoe Hill said . The Woodward storm was one of dozens of tornadoes believed to have been spawned by a furious storm system that wreaked havoc across large swaths of 10 states in the Midwest and Plains over the weekend . The only known casualties occurred in the northern Oklahoma city of about 12,000 , about 85 miles west of Enid . At least 29 people were injured , officials said . By early Monday , the National Weather Service lifted the last of widespread tornado watches in Minnesota , Wisconsin , Arkansas , Iowa and Illinois after threats of another furious outbreak of tornadoes never materialized . Strong thunderstorms remained a possibility during the early morning hours , the service said . The weather service 's Storm Prediction Center received 10 reports of tornadoes Sunday -- the last a reported touchdown in McLeod County in Minnesota -- and 122 reports of tornadoes Saturday . Officials credited working early warning systems elsewhere in the region with preventing more fatalities . Advisories from the system were issued two days in advance , rather than just hours , and were `` remarkably accurate , '' said Kansas Gov . Sam Brownback . `` People took it very seriously . '' But in Woodward , Oklahoma , where 89 homes and 13 businesses were destroyed , the storm took out the transmitter for the tornado warning siren system . `` We lost our manual override '' when the electricity was knocked out , City Manager Alan Riffel said . Given that and timing of the tornado -- after midnight , and after other severe weather had barreled through -- Oklahoma Gov . Mary Fallin said , the human cost could have been even worse . `` It 's remarkable that we did n't have more loss of life in Woodward , '' she said late Sunday afternoon . Fallin has declared a state of disaster emergency in 12 counties in order to help expedite resources . In southwest Iowa , residents of Thurman were digging through debris after a tornado struck Saturday . `` About 75 % of the homes are damaged or destroyed , '' said Mike Crecelius , Fremont County 's emergency management director . Four truckers whose rigs were blown off Interstate 29 , by the same tornado that struck Thurman , were the only ones hospitalized with storm-related injuries , the weather service said . The agency reported the twister had winds between 111 and 135 mph as it caused a half-mile-long damage path over 10 miles . Earlier , a confirmed tornado struck a hospital in Creston , Iowa , blowing out windows and damaging the roof , said John Benson of the Iowa Homeland Security and Emergency Management agency . There were no major injuries reported , and patients were relocated to other area hospitals . One of the biggest cities hit over the weekend was Wichita , Kansas , where resident Katie Sykes said torrential rains produced a `` river in my front yard '' and the prospect of a tornado had her shuddering in fear . `` When I was little , we prepared for storms , hearing the sirens and then going to the basement . And going through this experience , I felt like a little kid , young and scared , '' Sykes said . A tornado churned across the southern part of the city , home to a number of aircraft-related manufacturers . The tornado struck Boeing and Sprit AeroSystems , officials said . A few hundred employees were working at a Spirit Aero Systems plant , producing fuselages and other equipment for Boeing aircraft , said company spokesman Ken Evans , when a twister came through and caused the roof to collapse . No one was injured , and workers have been told not to come in until Wednesday as the damage is assessed . CNN 's Rob Marciano reported from Oklahoma and Maria P. White from Atlanta .
NEW : Death toll rises to A few hundred in Texas , Oklahoma . Authorities from Woodward to Texas are assessing storm damage . In Woodward , residents are preparing to bury the only known storm casualties . Tornado warnings are lifted , though forecasters warn strong thunderstorms are still likely .