What does the out of control signal fire represent for Piggy?

The crazy big fire represents chaos to Piggy. Piggy fears being killed on the island. He well knows that in a Darwinian society like this, he is the least fit and considered the most expendable. When Piggy sees the chaos of the fire the boys unleash at the top of the mountain, Golding writes, "Piggy stared into Hell." Indeed, this island is Hell for a boy like Piggy.