Looking at the footage, it seems like the plastics under the car were on fire, but that the pack itself was not. The foam they're using wouldn't have been enough to extinguish the pack if it had gone up, and given the car crashed into what is likely a transformer, I'm not going to call this a Model 3 fire.
The oil from the transformer likely caught fire, and like I said from the footage it seems the plastics under the car caught fire, but the pack didn't. This thread's intent seemed to be battery fires rather than just cars engulfed in flames. If it was about the latter, then all the cars that burned in the California wildfires count and this isn't even close to #1.