When Lithium batts get to 230°F they go into whats called a “runaway thermal event”. An exothermic reaction that reaches temperatures that melt glass and has a pretty pink flame. There aint no putting em out with conventional means...gotta just let em burn. Tesla batts are water cooled. Guess after sitting in hot temps for weeks the water cooling just isnt really much effective. Oh...theres like 7000 individual cells in a T-batt. Only takes one cell to go off and then you can only stand back and watch...hopefully at night time.
Or maybe we need to discharge them after an accident.
I think Rancho Cordova FD ought to register:
https://www.firefighternation.com/leadership/extinguishing-electric-vehicle-battery-fires/