Sheriff: Tornado causes ’major devastation’ but no deaths in Iowa city

An Iowa community was shut down much of Sunday afternoon while emergency crews remained hard at work, sifting through wreckage caused by a wave of powerful tornadoes that swept across the state overnight. The twisters caused major damage to about 60% of Mapleton, a city of about 1,200 residents, Monona County Sheriff Jeff Pratt told reporters Sunday. It was all part of a violent storm system that struck overnight, originating in eastern Nebraska and following a warm front across northern Iowa, according to National Weather Service meteorologist Frank Boksa.