Severe storms with high winds and driving rain caused damage in Chicago suburbs, knocking down trees. Residents describe hearing a giant crash, fearing it was their patio umbrella. Meanwhile, in southern Minnesota, officials and residents near the Rapidan Dam outside Mankato are concerned about potential flooding following the worst flood in almost 60 years. Prayers are being said for the dam to hold and prevent further damage. The severe weather patterns are causing destruction and concern for those in affected areas. #vizard