An evacuation order remains in place after a railcar in Ohio began leaking styrene on Tuesday. While the leak has stopped, roads in the area are also staying closed.

While the leak coming from the train car appeared to be a gas, the National Institute of Environmental Health Sciences says styrene is a colorless, flammable liquid used to make plastics and rubber.

A chemical leak in Whitewater Township Tuesday has prompted the closure of roads, schools and businesses.Sign up for our ...

A styrene leak in the East End near Lunken Airport in 2005 led to several days of evacuations for residents and a multi-million dollar class-action lawsuit.