Emergency crews from a host of government agencies were working through the night to clean up an estimated 2,000-gallon diesel spill in Baltimore’s Inner Harbor that started on Wednesday.

Some 2,000 gallons of diesel meant for backup generators spilled into the Patapsco River in Baltimore, Maryland, on Wednesday, upon overfilling the tanks. Officials are using oil absorbent materials and skimmers to rid the river of the diesel,

A 2,000-gallon diesel spill that originated at a hospital facility in Baltimore, Maryland, on Wednesday tainted a waterfront in a popular tourist spot in the city, but there was no impact on drinking water in the area,