Here are a couple of links to a gas fire in Chicago in 1998. This fire was fed by a high pressure 24" gas line that was ruptured by construction equipment. It took 30 minutes for the pipeline to shut down and for the residual pressure to escape.
Wow, I’d be running away too! High as those flames are though they are not 1,000 feet. I fly a lot and believe me 1,000 feet is pretty high. Can’t really tell about the distance to the flames in the pictures and the angle at which the shots were taken, but I’d guess they are in the 500 to 600 foot range.
500, 600 or 1,000 that’s a lot of flame!