Huge commercial lithium battery storage is made up of thousands or even millions of AA sizes batteries. So many that it is a statistical certainty that some will catch fire.
The big storage units have gone over the prismatic cells, the biggest are around 13x8x3 inches. Tesla has begun using prismatic batteries in some cars and its Megabuck storage unit.
Imagine these lithium battery storage by the millions in neighborhoods everywhere. Where can everyone evacuate to if they start on fire say by some clever commie chinese sending commands to surge electricity into them.