Entergy Mississippi officials said several hundred people were without power in scattered areas of south Mississippi.
Curfews were extended to noon in all three coastal counties — Hancock, Harrison and Jackson. Officials said road conditions were too bad for anyone to be out.
Hancock County Chief Deputy Don Bass said authorities rescued a Bay St. Louis resident from rising water early Wednesday.
Highway 603, the main route to Bay St. Louis and Waveland, was closed at Interstate 10.
"For the most part, we've been lucky, but we've got a long way to go," he said.
Darryl Antoine, a Waveland city worker, spent the night cutting trees off of roads, then checked the city's wells in the morning. He drove to his cousin's house early Wednesday to check on it.
Most of that street was flooded, but the house was rebuilt on stilts after Katrina and didn't appear to have wind damage. Antwoine said his own house was without power, but otherwise fine.
Jerry Beaugez, an assistant with the Bay St. Louis mayor's office has been working with the fire department, and said things have gone relatively well but it's too early to celebrate.
The water was still rising, a tin peeled off a business on Waveland and street signs fluttered in the wind. The storm could pound the area for hours and officials considered closing Highway 603, the main connector from Interstate 10 to Bay St. Louis and Waveland.
"There's not a lot we can do until everything subsides," he said. "As daylight comes, we'll get out and about and assess damages,"