NEW ORLEANS - In what may be their last peaceful pass before they get tough, rescuers scoured New Orleans' swamped houses and shattered high-rises Thursday, finding many stragglers finally ready to flee the filthy water and the stench of death.
"Some are finally saying, `I've had enough," said U.S. Immigration and Customs Enforcement spokesman Michael Keegan. "They're getting dehydrated. They are running out of food. There are human remains in different houses. The smells mess with your psyche."
Across a flooded city where as many as 10,000 or holdouts were believed to be stubbornly staying put, police made it clear in orders barked from front porches and through closed doors that they would return - next time, with force.
Police said they were 80 percent done with their scan of the city for voluntary evacuees, after which they planned to begin carrying out Mayor Ray Nagin's order to forcibly remove remaining residents from a city filled with disease-carrying water, broken gas lines and rotting corpses.
"The ones who wanted to leave, I would say most of them are out," said Detective Sgt. James Imbrogglio. "There may be a few left, so we're going to go check one of our last areas that's underwater today and then hopefully that will be it."
The job of carrying out the mayor's order was left largely to the 1,000 or so remaining members of New Orleans' beleaguered police force.
"We are not going to be rough," said Police Chief Eddie Compass. "We are going to be sensitive. We are going to use the minimum amount of force."
The near-conclusion of the voluntary evacuation came as receding floodwaters revealed still more rotting corpses. Nagin has said the death toll in New Orleans alone could reach 10,000, and state officials were ordering 25,000 body bags.
Volunteer rescuer Gregg Silverman, part of a 14-boat contingent from Columbus, Ohio, said he expected to find many more survivors in his excursion through the city's flooded streets. Instead, he found mostly bodies.
"They had me climb up on a roof, and I did bring an ax up to where a guy had tried to stick a pipe up through a vent," Silverman said. "Unfortunately, he had probably just recently perished. His dog was still there, barking. The dog wouldn't come. We had to leave the dog just up there in the attic."
As for other bodies his group encountered: "Obviously we are not recovering them. We are just tying them up to banisters, leaving them on the roof."
The Army Corps of Engineers said the city was still about 60 percent flooded - down from as much as 80 percent last week - but was slowly being drained by 37 of the 174 pumps in the Orleans, St. Bernard and Plaquemines parishes, and 17 portable pumps. They can pump out 11,000 cubic feet per second, roughly equal to 432 Olympic-size swimming pools per hour.
Engineers said the mammoth undertaking could take months, and could be complicated by corpses getting clogged in the pumps.
"It's got a huge focus of our attention right now," said John Rickey of the Corps. "Those remains are people's loved ones."
In Washington, President Bush declared Sept. 16 as a national day of remembrance for the dead and he encouraged those displaced by the storm to sign up for $2,000 debit cards to help rebuild their lives. Congress also rushed to approve an additional $51.8 billion in emergency aid for the victims.
Bush dispatched Vice President Dick Cheney to the region Thursday amid persistent criticism of the sluggish pace of the federal response. Stopping along a street of splintered homes in Gulfport, Miss., Cheney said much progress is being made in a relief effort he termed "very impressive."
As he spoke, a passer-by hurled an expletive at the vice president. When asked if he was hearing a lot of such sentiments, Cheney said: "First time I've heard it."
At Louis Armstrong Airport, now a bustling military encampment, New Orleans' City Council met for the first time since Katrina, with members defending how they handled the disaster and defiantly vowing to rebuild.
"New Orleans has been built back from many disasters," said Councilwoman Cynthia Hedge Morrell. "New Orleans was here before there was a United States of America."
Some 400,000 homes in the city are without power, with no immediate prospect of getting it back. Where water has been restored, it is not drinkable. The city is still dangerous - not primarily, as it was last week, from armed criminals, but from the sewage-laden floodwaters, which are believed to contain E. coli and other dangerous germs.
Fires were also a continuing problem. At least 11 blazes burned across the city Thursday, including a rash of fires that raged across the campus of historically black Dillard University, detstroying three large buildings.
Across town at the Audubon Zoo, curator Dan Maloney said some of the 1,400 animals were lost, but keepers have been too busy caring for survivors to take a count. The dead included two sea otters that were moved to different tanks before Katrina and died from stress.
Some of the most vulnerable creatures - including several macaws, eagles and a pair of African lions - were being transferred to other zoos.
Said chief gardener Tran Asproditis: "It's just sad that this has happened and it is going to take us a long time to recover and reopen for the kids. And that's what we want to do, is just open so the kids can come back."