Hydrochloric acid is leaking from a semi truck that overturned on a bridge on Monday morning, authorities said.
The Fire Battalion Chief told reporters that traffic to the bridge was closed off following the rush-hour accident, which prompted a chemical leak and a plume of fumes coming from the crash scene.
He said it remains unclear how much of the nearly 45,000 pounds of hydrochloric acid being carried in the truck had leaked so far.
The fire official said the semi truck driver was rescued from the vehicle and sent to the hospital with unspecified injuries. There was no immediate word on the cause of the accident.
While the immediate area was evacuated following the crash, firefighters were able to stop a larger leak from the truck.
It was reported that crews are working to plug the remaining rupture point, while the air quality east of the site is being examined by emergency crews.
An individual can experience pulmonary edema, as well as irritation and inflammation to the eye, nose and respiratory tract as a result of exposure to hydrochloric acid, according to the Environmental Protection Agency.