The first sign of trouble came from a gurgling noise emanating from the sink, bathtub and toilet in Katie Knight’s home. She looked out the window early Tuesday to see floodwaters already lapping at her back deck. "I panicked," said Knight, a 31-year-old disabled Army veteran. "It’s an eerie feeling when you see waters rising, because you are at the mercies of God’s hands." The sudden flood that swamped the south-central Missouri city of Waynesville killed a 4-year-old boy who was swept from a vehicle, and authorities were still searching the water Tuesday for a woman who is believed to be the mother of the boy, who was found just upstream from Knight’s home. The floodwaters left others clinging to tree branches in swiftly moving high water and damaged about 100 homes and businesses, authorities said.