Great response, just a few small nitpicks: Using water on a gasoline or oil fire is a bad idea (the fire spreads since gas and oil are lighter than water), so

Great response, just a few small nitpicks: Using water on a gasoline or oil fire is a bad idea (the fire spreads since gas and oil are lighter than water), so fighting vehicle fires for ICE vehicles where the fuel tank has ruptured is a non-trivial problem for firefighters. The "easy" vehicle fires are ones where just the engine compartment and maybe the interior are on fire, but the fuel lines and tank are still in tact. In some ways a battery fire is easier to put out since it won't spread the same way and responds well to water. Exploding 18650s tends to only happen with cheap, poorly manufactured variants. Most of the time if they short they will overheat, bulge, and sometimes catch on fire. Having enough of them actually explode to cause injury to vehicle occupants is probably about as likely as a fuel tank exploding in an ICE vehicle accident. Granted, there might be a higher fire risk for electric vehicles in severe collisions that damage the undercarriage area where the batteries are stored.