Baton Rouge, La. (AP) -- Thousands of people in southern Louisiana hunkered down in shelters Monday, forced out of their homes by intense flooding that took many people by surprise.
The weather had improved from the torrential downpours, but rivers and creeks in many areas were still way above flood stage, and people downstream eyed the deluge with concern.
Across southern Louisiana, residents scrambled to get to safety as heavy rain in some areas came close to 2 feet over a 48-hour period. Rescuers evacuated more than 20,000 people since the flooding started Friday and more than 10,000 people were in shelters as of late Sunday, according to Louisiana Gov. John Bel Edwards. At least six people were killed.
"Everybody got caught off-guard," said Anthony "Ace" Cox, who started a Facebook group to help collect information about where people were stranded. "It was an absolute act of God. We're talking about places that have literally never flooded before."
Cox lives in New Orleans but his parents live in Central, a town hit hard by the rising water. His parents evacuated to his grandparents' house in Baton Rouge, but that area started taking on water so they evacuated again to a hotel in Baton Rouge.
He is worried his parent's home may not be habitable for months.
National Guard soldiers in high-water vehicles, boats and helicopters helped rescue people alongside Good Samaritans.
Jared Serigne of St. Bernard Parish said he helped organize volunteer efforts involving roughly 70 experienced boaters who helped hundreds from flooded communities such as Monticello, St. Amant and Port Vincent.
He criticized the government's response, saying officials were slow clear roadways and to provide access to potential boat launch points that could be used by volunteers.
Serigne, a TV producer of an outdoors show and marketing director for a marine equipment business, said government agencies should do more to coordinate with volunteers.
"You've got all of these people who hunt and fish who have more experience than the average first-responder," he said.
The Louisiana State Police started allowing people to reclaim cars left behind on a portion of Interstate 12 that had to be shut down because of the flooding. Motorists had in some instances been stranded overnight awaiting rescue.
Vehicles that were out of gas, stalled or unclaimed were being towed Monday to the shoulder to help clear the interstate.
From the air, homes looked more like little islands surrounded by flooded fields. Streets descended into impassable pools of water and shopping centers were inundated with only roofs of cars peeking above the water.
From the ground it was just as catastrophic.
Drivers tried to navigate treacherous roads where the water lapped at the side or covered the asphalt in a running stream.
The slow-moving, low-pressure system moved into Texas, but the National Weather Service warned that there's still a danger of more rain and fresh floods, as swollen rivers drain toward the Gulf of Mexico.
Rivers in the Baton Rouge area have started to fall, but still remained above flood stage after setting record levels over the weekend, the National Weather Service said Monday.
"The rivers and streams north of Interstate 12 have crested and have started to drop, while those south of the interstate continue to rise," meteorologist Mike Efferson said.
He said the Baton Rouge area could see up to a half-inch of rain Monday.
The Comite River just east of Baton Rouge dropped nearly 2 feet by Monday from the 34-feet over the weekend. Flood stage is 20 feet. The Amite River at Denham Springs was at 43.5 feet Monday after reaching 46.2 feet. Flood stage is 29 feet.
The federal government declared a major disaster, specifically in the parishes of Tangipahoa, St. Helena, East Baton Rouge and Livingston.
The evacuees included the governor and his family, who were forced to leave the Governor's Mansion when chest-high water filled the basement and electricity was shut off.
Noel Michael, a school teacher, and her husband Deryl, a retired Marine, spent Saturday piling sandbags around their home in the Livingston Parish town of Walker but it became fruitless.
"It was like a water fall," she said.
They escaped in her husband's pickup — he was behind the wheel and she was on the hood — helping navigate.
They took refuge at her parents' house in Livingston. But they didn't rest long.
On Monday morning they were at one of a chain of area grocery stores run by family friends — helping clean up and re-stock shelves while managers called suppliers and warehouses, hoping trucks could get to them to replenish meat, poultry and milk while flood-weary residents lined up outside.
"My husband and I just said, you know, we can sit here and cry or we can help cleanup," Noel said in a telephone interview, her voice breaking. "We're able-bodied. This can get our mind off things."
Associated Press writers Rebecca Santana, Kevin McGill and Bill Fuller in New Orleans contributed to this report.