Still Want an EV? Watch this:

[ProfessorGAC]

49. Yes, But...

....the likelihood of discharge is very low. So, might be acceptable risk.
That said, a pressurized cartridge of salt & sand would smother a metal fire.
We had class D for extinguishers in the lab, because we worked with lithium, sodium, & potassium.
Once covered, it can be scooped up and put into a pail of squalane, which is a high chain, low volatility hydrocarbon. No water, no reactive sites, so no fire.
Later we could pick the metal out and put it back into the cans with oil. The rest can be properly disposed of.
We never had to do it, but we learned how, just in case.