A collapsing train bridge in Paulsboro, NJ, this morning sent four train cars into Mantua Creek, where they are leaking vinyl chloride into the air and water, reports the South Jersey Times. Seven cars were reported overturned, and 18 people reported breathing difficulties. Firefighters and hazardous material crews have been called in. Major roads into the city have been closed and three nearby schools are on lockdown. "We have a half-mile area evacuated around the bridge," a Coast Guard spokeswoman tells the Philadelphia Inquirer.