Who have been predicting the end of the world since the beginning. But this year doomsday predictions seem to be unusually urgent and wide spread and whether you blame the Mayan calendar or melting... See More
Who have been predicting the end of the world since the beginning. But this year doomsday predictions seem to be unusually urgent and wide spread and whether you blame the Mayan calendar or melting ice caps are tearing currencies. Tonight we meet a diverse collection of folks who are just sitting around waiting for the worst. They're getting ready to live through it here's ABC's David Wright. Volcanoes. Earthquake financial. -- yeah. Come what may Tim Ralston he's ready -- Jeff -- Freeze dried food survival -- first aid ammo what do you think -- -- -- You know there's a lot of different things could happen. For me I look it. Crappy news kind of like insurance you know you have car insurance health insurance life insurance -- -- apocalypse entrances. Like I'm sure it's the Scottsdale father of two calls himself a proper part of a growing movement preparing for the end of the world as we know. Indicating my life really wasn't on the same page as I was. The more information I started to give to her then it opens your eyes to the potential threats that are out there. He's -- the family's two car garage into a staging area. Oh my quite effective it's. Really ready to go -- you keep this -- at all all times he has cartons of chicken with a shelf life of fifteen years. Ways to purify even the most polluted water. -- -- -- And weapons lots of weapons that's my sons actually your son doesn't make it where is -- -- -- a week Tim takes his sons to the desert about thirty miles away on a practice round the bad guy is the red -- A dress rehearsal for dooms it go go go get him get it. Russia eventually he plans to build an underground shelter here a converted shipping container tricked out with everything they'll need to survive. This -- I have a lot of other religious friends that say I don't want prepare that's going happen. -- you know what feels like to start. Ralston is one of several people the National Geographic channel followed for their new series Tuesday preparers. There's a couple in Texas who have converted school buses into get -- vehicle. They live off the grid filter their own water. And store enough canned goods to last 22 people for years. And there's the New England mom who calls herself the Doris day of June. I'm preparing for a Black Swan event like a catastrophic in Madrid earthquake Kathy Harrison doesn't exactly fit the survivalist stereotyped. She isn't stockpiling weapons instead. She keeps beat us in a -- down situation. Those bees become not just food for us that they become. -- that we can barter for those fees are the essence of resilience for us -- can become very -- -- one and only foods that won't go bad you can store. Ever ever ever ever. Paranoia is part of his -- -- So much so that last night during the Super Bowl. General Motors conjured up this vision of the day after tomorrow. The only survivors of the apocalypse where these do. They didn't drive the longest lasting most dependable truck -- the end of days as the ultimate marketing slowed can be. That -- a hand basket motif seems to be everywhere these days. Even on comedies like parks and recreation her ideas are the world is going today and tomorrow is known. -- that's the entire planet. One wonderful. -- -- -- -- -- -- -- -- -- -- -- Some fear our downfall will come from our dependence on technology and fossil fuels. Forcing us back to the stone age mad Max -- Others are convinced the lions headed right. And that in 22 -- just a few months from now will simply run out of time. Of course there's always the ever popular Christian and game. The rapture. Yes enough people believe the end is -- Prepping is now big business a little over a year ago we went to the middle of the Mojave Desert to meet Robert casino. A real estate developer and all real estate developers. He's converting a Cold War bunker into a luxury modern shelter snow is our. Just -- to -- underground underground condos fortified against the unthinkable. Complete with a hospital and a movie theater price tag 50000. Dollars per unit up front. Long before this one was complete it was almost sold out. Casinos also building another shelter in Indiana big enough for eighty people that was farther along almost complete also almost sold out. We're looking -- -- -- China three Taiwan Romania Russia. -- people coming to us. Paranoia sells some of the doomsday -- know it's true. Tim Ralston doesn't just stockpile this stuff he sells it nearly a website or something that we have -- -- do it. It's called Europe's that are people can go there and buy anything order on line. Prepared for anything. Am making a profit -- -- has got work on vacation -- and David Wright for Nightline in Scottsdale there was. The -- series doomsday preparers premieres tomorrow -- National Geographic channel --
This transcript has been automatically generated and may not be 100% accurate.