The styrene leak at a railyard in the Cleves and Whitewater Township area has stopped, but officials said an evacuation order remains in place.A spokesperson for the Central Railroad of Indiana said the company was notified at around 1 p.m. Tuesday that one of its tanker cars was venting styrene near the intersection of US-50 and OH-128. Crews responded to the scene and began applying water to the tanker car.After several hours, officials said the car was safely separated from the rest of the train and the leak stopped. Still, officials said crews remain working on the car and testing the air. Local evacuation and shelter-in-place orders remain intact. "It's not going to be short," officials said of the current timeline. Officials worried of 'possible explosion' after styrene leak in Cleves, Whitewater Twp. areasThe Hamilton County Emergency Management Agency said those within a half-mile radius of the railyard by US-50, OH-128 and Valley Junction Road should remain out of the area until they receive an all-clear. Residents outside the immediate half-mile radius but still within three-quarters of a mile of the leak are told to continue to shelter in place. The following roads are closed until further notice: US-50 from Lawrenceburg Road in Whitewater Township to State Street in Cleves OH-128 at Cilley Road Kilby Road at Suspension Bridge Cooper Avenue at US-50 in ClevesAccording to the National Institute of Environmental Health Sciences, styrene is a colorless, flammable liquid used to make plastics and rubber. Styrene is highly volatile.The CDC reports that people may experience tiredness, slowed reaction times, concentration problems and balance issues if they are exposed to styrene concentrations more than 1,000 times higher than the levels normally found in the environment. At this time, Siefke said they have received zero reports of injuries. Anyone who may be feeling physical effects should go to an emergency service or call 911.Video provided by Aaron Vetter shows gas coming from a tanker car in the area. In the video, you can hear someone say, "It's been going on for 45 minutes." WCPO's Sky 9 captured firefighters putting water on the train car. Video shows chemical leak from train in ClevesThree Rivers Local School District reported that classes have been canceled for Wednesday. A spokesperson for Kroger said their store near the leak is currently closed. The Miami Township branch of the library is also closed.