From the outside, Jerry Erwin’s home in the northwestern US state of Oregon is a nondescript house with a manicured front lawn and little to differentiate it from those of his neighbors.

But tucked away out of sight in his backyard are the signs of his preparations for doomsday, a catastrophic societal collapse that Erwin, 45, now believes is likely within his lifetime.

“I’ve got, under an awning, stacks of firewood, rain catching in barrels, I’ve got a shed with barbed concertina wire, like the military uses,” he told AFP.