The main aisles along the Home Depot in Gulfport are filled with hurricane supplies and signs warning people not to wait.
"A lot of them are coming in to buy flashlights, batteries, radios, walkie talkies," store manager David Benoit said.
The Smiths noticed a great deal on storm doors and snatched them up.
"We're doing the best we can to prepare for this storm. We're hoping we can get these doors up in time," Willie Smith said.
Their next stop is the grocery store to stock-up on food as they brace for Arlene.
"We do expect some of our children in low lying areas will be coming over to weather the storm with us," Victoria Smith said.
Billy Walker came from Creola, Alabama to buy a generator.
"I don't know where the thing might go yet. I don't want to take no chances. I usually wait until the last minute, but this time I'm going to get ahead of it a little bit."
As more people try to beat the rush, items that are in high-demand may fly off the shelves.
Store employee Hugh Smith pointed to a pile of plywood and said "I guarantee you, when you come in here tomorrow night, that whole stack of plywood will be gone".
But there's no reason to panic. Most stores have plenty of storm supplies on stand-by.
"We basically have D.C. facilities that stockpile hurricane items or disaster relief basically. So these items can get to the stores quickly," Benoit said.
Many stores will stay busy throughout the night. They're expecting extra loads of generators, plywood and other storm-related materials to arrive.