Yes, but the problem with Li-Ion fire in a confined environment is that it generates a lot of toxic gas (doable but you need equipment for that), a lot of hydro

Yes, but the problem with Li-Ion fire in a confined environment is that it generates a lot of toxic gas (doable but you need equipment for that), a lot of hydrogen which will react with everything near by, and the risk of explosion (in the sense of rapid fire expansion with a thermal run-away of most cells) is higher. My guess is that the floor was poorly ventilated with complex access, rendering the access to the fire unnecessarily hazardous.