Store Shelves Quickly Emptying Of Batteries, Bread, More

"It's been non stop like this for about 36 hours," said Wal-Mart's Stan Ellis.

From store to store, aisle to aisle, you can see what's the must have for this "inside weekend."

"This is an unprecedented shopping event, and I've been with Wal-Mart 28 years," he said.

Even bread and water is mostly gone. When a load comes in, if it's what you'd call a necessity, it's tough going.

For dogs and cats, they might have to get used to a few days without their favorite chow. Petsmart was picked over Friday. They say trucks will be in Saturday.

If the lights go out, a few lucky people will be the envy of their neighbors.

Home Depot's Patricia Hadley: "It's been pretty nutty because we had people coming in, and we thought we only had 100 generators to sell and then, 'No, it's 150 generators,' then 'No.' Then 200, and -- boom -- we found out we had 250 generators."

But it looks like that may be it. And folks forked over the cash for these Saturday.

Justin Holt bought a generator for his home: "My parents called and said, 'Did you get your generator yet,' and I said 'No,' and it's just to make them feel comfortable."

Hadley speaks of her customers' frustration.

"We have had customers saying 'What do you mean you don't have a generator? I heard you had a generator!' and then I tell the customers that we pre-sold them, and it's like 'Oh my gosh!"

They will have light, but others who didn't get a generator are out of luck. Flashlights are gone. Even sand is gone, with people hoping to block the runoff from the rain.

"I'd say we went through them in about 45 minutes," says Home Depot's Leon Roy.

Exasperation or exhilaration, it's no matter. Aren't we all in this boat together?

Reporter: "So, if you're one of the few people in your neighborhood who has power when power goes out, are people going to come banging on your door?

A woman told us "Yes. Because they've already asked."

Reported by Morgan Palmer.