Weakened but still potent, Barry inundated the Gulf Coast as it continued its slow advance morning, bringing fresh fears of flash flooding to Mississippi's capital city even as it appeared unlikely to deluge New Orleans.
Coast Guard crews rescued a dozen people and two pets from flooded areas of Terrebonne Parish, south of New Orleans, some of them from rooftops, a spokeswoman said.
Video shows a 77-year-old man being airlifted with a dog after officials say his home was flooded by four feet of water.
None of the main levees on the Mississippi River failed or were breached, and they were expected to hold up through the storm, Gov. John Bel Edwards said.
But a levee in Terrebonne Parish was overtopped by water for part of the day, officials said. Video also showed water getting over a second levee in Plaquemines Parish, where fingers of land extend deep into the Gulf of Mexico.