The postwar prosperity was interrupted on the morning of April 16, 1947, when the French ship "Grandcamp", containing ammonium nitrate fertilizer, exploded, initiating what is generally regarded as the worst industrial accident in United States history, the Texas City disaster. The fertilizer manufactured in Nebraska and Iowa was already overheating when stored at the Texas City docks. The blast devastated the Monsanto plant and offices, which were immediately across the slip from the "Grandcamp", blew away the warehouses, showered shrapnel from the ship in all directions, and ignited a second ship, the S.S."High Flyer", docked at an adjacent slip. Released from its mooring by the blast, the "High Flyer" rammed a third ship, SS "Wilson B. Keene", docked across the slip. Both ships also carried ammonium nitrate fertilizer and were ablaze. They, too, exploded. In all, the explosions killed 581 and injured over 5,000 people. The explosions were so powerful and intense that many of the bodies of the emergency workers who responded to the initial explosion were never accounted for. The entire Texas City and Port Terminal Fire departments were wiped out.