The Texas City disaster was an industrial accident that occurred on April 16, 1947, in the Port of Texas City. It was one of the deadliest industrial accidents in U.S. history.
The disaster started with a fire onboard the French-registered SS Grandcamp, which was docked in the port and carrying approximately 2,200 tons of ammonium nitrate, a chemical compound predominately used in agriculture as fertilizer but also used as an industrial explosive. The fire ignited the explosive compound and the initial blast set off a chain reaction of fires and explosions in other ships and nearby oil-storage facilities.
The initial fire had attracted spectators to the shoreline, who believed they were a safe distance away. The water around the docked ship was boiling from the heat of the fire. At 9:12 a.m. the ammonium nitrate exploded sending a 15-foot wave off the Texas shoreline. The Grandcamp explosion destroyed the Monsanto Chemical Company plant and resulted in the ignition of refineries and chemical tanks on the waterfront. The shock wave was felt as far away as Louisiana. The two-ton anchor was blown 1.6 miles.