That's a bit on the fire fighters. It's pretty common knowledge that you can't distinguish a battery fire with water. Pro tip: Kitchen oil fires also shouldn't be extinguished with water as it will go boom 😂
Firefighters across the globe are facing a new problem with burning electric cars - they can't easily be put out - and require many times the amount of water and efforts to extinguish. A case in point is a wrecked Tesla sitting in a junkyard for weeks before it spontaneously combusted and the fire brigade couldn't kill the flames with their current toolkit.