German cities are in the middle of equipping all fire departments with containers that they can flood with water to submerge EVs in. The idea is to let the EV burn, cool it with water, and then tow it under supervision of a fire truck to a fire station to put the EV into water for 1-2 days. Compared to ICE vehicles it's very complicated and binding a fire truck over a span of multiple hours instead of 1 or 2.