As a result of a defective weld performed 15 years prior, cracking led to the sudden bursting of the water tank on a 35,000 m³ gas-holder and the discharge of 15,000 m³ of water and 25,000 m³ of gas containing a 70% concentration of CO. The CO cloud immediately ignited. The sheet of water overturned a railcar full of molten metal (“torpedo car” design) awaiting processing onsite and generated a vapour explosion. The metal projections then caused the fire to spread to 3 other buildings also part of the facility. The blaze was controlled in 3 hours thanks to a fleet of 17 fire-fighting vehicles. One injury was reported.