BOONE, Iowa — Chemicals spilled Tuesday after 16 cars of a freight train were blown off a bridge during a fierce storm and plunged 185 feet into a river valley.
"It's very evident there are chemicals leaking out. You can see the green tinge in the water," Gov. Terry Branstad said after flying over the site.
Six people--a state trooper, three fishermen and two railroad workers--were treated at a hospital for nausea and other symptoms that state officials said may have resulted from exposure to materials leaking from truck trailers riding piggyback on the railroad cars.
No one on the train was injured in the derailment late Monday.
Officials evacuated a one-mile area around the crash scene, including a Bible camp attended by 200 high school and college students. Iowa Natural Resources Department spokesmen recommended that people stay out of the Des Moines River below the accident site as well as a large recreational reservoir downstream.