"What the water dumping is for is making sure it doesn't re-ignite on its own" Yes, hence why I said it requires lowering the temperature to below the threshol

"What the water dumping is for is making sure it doesn't re-ignite on its own" Yes, hence why I said it requires lowering the temperature to below the threshold for it to re-ignite. Here's one submersion system: https://www.garrisonflood.com/ev-fire-fighting-water-submersion-pool https://www.garrisonflood.com/ev-fire-fighting-water-submers... It requires a significant more water to put them out. Hence it's more efficient to just submerge them in water than it is just dumping water on top of them.