(CNN) -- Bill Coleman's business in New Orleans was looted during Hurricane Katrina. Now, Hurricane Isaac threatens to bombard the region with heavy wind and rain on Katrina's anniversary. He may have to close up shop again until the storm passes and, if necessary, power is restored.
But this father of two and grandfather of one said he is "not concerned."
"Katrina was a once-in-a-lifetime event," the owner of Coleman's Retail Store told CNN Monday, noting that forecasters aren't predicting Katrina-like catastrophic conditions for the city he's lived in his whole life.
Also, "We have a vastly improved police department," Coleman said. "A much higher level of conduct is expected. ... There have been a lot of positive changes."
"The city was under siege" during Katrina, with a "total breakdown of society," he said.
Now, "it's just a different city."
Coleman isn't alone in his outlook and relatively relaxed state about the impending storm.
Jerry Amato feels confident that his restaurant, just a couple of blocks from the water, won't be flooded.
"I just don't think it's going to be strong enough -- but I'm not weatherman," he said.
When the storms come through, he'll "just lock the door" to Mother's Restaurant and wait out the storm, he said.
He doesn't think it'll be long before he reopens so the establishment -- which closed down for months in 2005 -- can resume serving the "world's best baked ham."
It hasn't closed yet. Amato planned to "wait until the last minute to decide whether to pull the trigger," but now he faces "a quagmire." He wouldn't mind staying open longer, but since schools are closing, his employees need to leave. "They have to stay home and take care of the kids."
Thomas Blais, manager of the upscale men's shoe shop Allen Edmonds at New Orleans' Canal Place mall, said his and other shops were closing Monday "because our families need to get home to prepare their houses for the storm."
But he, too, is "not overly" concerned about Isaac.
While the mall experienced looting and fires during Katrina, he doesn't expect a repeat. It's a "considerably smaller storm," Blais notes, and he expects the authorities to keep order.
In fact, there's something Blais looks forward to if the power goes out.
"Neighbors will get together and have one big barbecue. As soon as we lose power, we're going to start cooking out the food in all the refrigerators."
If the streets are too wet, there are "rooftops, terraces, courtyards that are kind of covered," Blais said. "It's wonderful after the storm, when everybody comes out and starts talking, drinking, and hanging out.
"That's the good part about the storms -- it brings neighbors together."
Coleman said those neighborly feelings have grown in recent years. "I think we've got a really a much improved and a much higher level of thought and spirit in the city. There's much more unity."
The seeds of that came in Katrina's wake, he said. "In some ways there was a lot of good that came from Katrina. I'm still very emotional about it. It changed my whole life.
"It brought out some of the very best in America."