75 tornadoes hit Great Plains over the weekend (CBS/AP) Forecasters say it appears about 75 tornadoes touched down in four Great Plains states Saturday. Greg Carbin, a meteorologist at the Storm Prediction Center in Norman, Okla., said Monday most of the tornadoes were in Kansas, followed by Oklahoma, Iowa and Nebraska. The tornadoes hit during a 24-hour period from 7 a.m. Saturday to 7 a.m. Sunday after forecasters warned of a "high risk" of severe weather. Tornadoes take sixth life in Oklahoma PICTURES: Violent storms sweep Plains States At least six deaths were blamed on a storm that went through the northwest Oklahoma town of Woodward and destroyed more than 100 homes and businesses. Woodward County emergency management director Matt Lehenbauer said that the sixth person passed away after he was brought to an Amarillo, Texas hospital the morning after the tornadoes hit. CBS This Morning (CTM) added that 28 people were injured. Thirteen business and 89 homes were destroyed, according to CTM. Many tornadoes hit in unpopulated rural areas in Kansas and Oklahoma, and Carbin says researchers are still collecting data. Oklahoma Gov. Mary Fallin declared a state of emergency in 12 counties Sunday, CTM reported. Initial observations from spotters produced an estimate of up to 120 twisters.