Where was this indicated? As
@Mattb4 pointed out in a few messages above the shelf the batteries were on only shows the metal cross beams and legs left which seems to indicate there was very little metal supporting and surrounding the batteries.. i.e. most of the shelf was flammable. Would like confirmation of that. Even if batteries did catch fire there seems like there should be way to one, prevent it from spreading to other batteries/shelves and two, to not catch something flammable on fire outside of the immediate battery storage area.