The 1947 Texas City disaster was an industrial accident that occurred on April 16, 1947, in the Port of Texas City, Texas, at Galveston Bay. It was the deadliest industrial accident in United States history and one of history's largest non-nuclear explosions. A mid-morning fire started on board the French-registered vessel SS Grandcamp (docked in the port) and detonated her cargo of about 2,300 tons (about 2,100 metric tons) of ammonium nitrate.^[1] This started a chain reaction of fires and explosions in other ships and nearby oil-storage facilities, ultimately killing at least 581 people, including all but one member of the Texas City fire department.^[2]

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