This reminds me of the Chernobyl nuclear reactor meltdown. They put out the fire by dumping boron and sand on the core from helicopters.
https://www.livescience.com/65515-chernobyl-in-modern-times-...
https://www.livescience.com/65515-chernobyl-in-modern-times-...
Be warned: the "Things I Won't Work With" category is entertaining and can easily take up an evening of your time.
Don't forget the "Things I’m Glad I Don’t Do" category with such gems as "There’s Toxicity, And There’s Toxicity." Not as many posts as "Things I Won't Work With", but enough amusement for few good reads.
OTOH, large industrial plants often have their on on-site fire brigades that have specialized equipment and training specifically around the unique hazards found at their facilities. Not sure what the situation was here at the Tesla plant. But I can say that if my old volunteer department in a mostly rural part of NC had ever encountered a large flammable metals fire (the most likely scenario would probably have involved something in transport, and a motor vehicle collision), we would almost certainly have started requesting dump truck loads of sand, and a front-end loader.