Thunderstorms that swept over the Texas Gulf Coast in the US sent a bolt of lightning straight to a 600,000-barrel crude storage tank on 23 July.
The consequent fire, at tank farm operator Teppcos facility in Texas City, Texas, was doused 45 minutes after it started with fire crews using a foam fire suppression system.
The fumes from oil trapped under the tanks floating roof were ignited by the lightning.
Were going to inspect the tank for damage and if there is any well take appropriate steps to repair it, Teppco spokesman Rick Rainey says.
The farm supplies major refineries in Houston and Texas City.
About 13.5% of US refining capacity is located in these areas.