New Orleans Flooding May Last for Days
New Orleans is apt to stay awash for days under oily, filthy water infested with mosquitoes, even if failed levees can be fixed quickly, according to experts assessing the flooding left by Hurricane Katrina.
An initial sense of relief that the city escaped the storm's worst dissolved Tuesday, as an estimated 80 percent of the 180-square-mile city gradually turned into an urban swamp.
"While everyone knew this could happen, I don't think anyone was really prepared for it," said oceanographer Paul Kemp, at Louisiana State University's Hurricane Center. "There are some disasters beyond comprehension, and I think this is one of them."
Murky water, laced with junk and pollutants, coursed through the city, including many downtown streets. Residents and rescuers came across floating bodies, though the city's death toll was still unknown late Tuesday.
Flooding specialists predicted that conditions could worsen as authorities focused first on saving people trapped in buildings.
Some flood-control pumps were broken, choked by excess water or storm debris. Others were lacking power needed to run. Roofs were reported collapsed on at least two major pumping stations. Without the pumps, much of the flood water will have nowhere to drain in this city cradled within a bowl, at an average of six feet below sea level.
In a frustrating catch-22, it will be hard to fix the pumps and restore their power while they are under water, but it's hard to drain the water without the pumps, the flood experts warned.
"It's going to be days before they get all that water out," said marine scientist Ivor van Heerden, also of LSU, who developed flooding models for the city. He was out with a boat inspecting water levels Tuesday.
When the hurricane's eye veered away from the city Monday morning, the fiercest winds and storm surge bashed into the coast east of New Orleans. Though some neighborhoods flooded, most of the city was spared severe flooding in the immediate aftermath. By early Tuesday, however, waters were creeping into large parts of the mostly evacuated city, which is normally home to about 484,000 people.
This flood water apparently came from at least two levee breaks at the Industrial Canal and the 17th Street Canal, according to the LSU specialists.
Helicopters were dumping 3,000-pound sandbags onto the levees, beginning the task of trying to plug them.
The experts warned of potential dangers ahead. Louisiana's frequent summer rains or even another hurricane could add to flooding in coming days or weeks, they said. The sitting water could collect more contaminants from homes and industries, and mosquitoes could amplify the danger of disease.
"Because it doesn't drain, there's a chance for things to concentrate," said Marc Levitan, another flooding expert at LSU.