I shot at our towns water tower once.... never even made a dent.
The town I grew up in had a huge water tank at ground level. One day I was at a red light and a car comes screaming around the curve, jumps the curb, crashes through the fence and rams the tank. He hit a support strut and besides a good dent didn’t do much damage. I was watching and wondering how much fun surfing in the car would be.
Back on topic: good to know that bullets don’t damage the tanks and I wonder if it would be different if he’d used tracers. (I know very little about tracers so my ignorance may be on full display.)
Jet fuel is basically kerosene. A bullet hit is not going to make it explode.