Small towns in Oklahoma began a long cleanup Monday after tornadoes flattened homes and buildings and killed four people, including an infant, widening a destructive outbreak of severe weather across the middle of the U.S. Punishing storms that began late Saturday in Oklahoma injured at least 100 people, damaged a rural hospital, washed out roads and knocked out power to more than 40,000 customers at one point. The destruction was extensive in Sulphur, a town of about 5,000 people south of Oklahoma