Day smiles when asked if some wonder whether she's gone too far.
"The guy who delivered my wheat said, 'You know, this is never gonna do you any good,'" she says with a laugh. "I said, 'I know, I don't care...it's peace of mind, you're in control."
Jeff Edelstein at SOS Survival Products says an "eclectic" clientele has kept him busy.
Increasingly, buyers are stocking up in response to beliefs the ancient Mayan calendar may predict the end of the world on December 21, 2012.
"That's a big reason people are storing up on a lot of the water and pre-packaged foods," he says.
Most freeze dried foods, or Meals Ready-to-Eat, are made by private companies like The Wornick Company and Unaka Corp.
Edelstein says demand across the country has been so strong that one of his main suppliers has stopped shipping to many retailers. "They're doubling the size of their production and they can't keep up."
Debbilyn Day knows if a major earthquake hits and people can't get to supplies of food or water, her neighbors will show up at her house. That doesn't bother her.
"When you are prepared," she says, "it puts you in another category. I can help, I'm not desperate."