Materials that bring along their own oxygen supply are impossible to extinguish with water. Like those underwater flares. Fire departments should know that. Looks like they wasted 32k gallons of water.
“Looks like they wasted 32k gallons of water.”
You aren’t as smart as you think you are. The water is not wasted. The idea is to cool what is burning. If it’s cooled sufficiently it quits burning, O2 supply or not.