New Orleans Mission, said the charity was spending more than $1,000 each day just on fuel to power generators at its three locations, where it is sheltering more than 300 people. Every day, a team drives into Mississippi to load up tanks of diesel fuel and gas, he said.

“We’re still days away from power,” Mr. Proctor said. “We’re in a dire situation, the entire New Orleans metropolitan area — the lack of power, the smell of garbage.”

Not far away, under U.S. Highway 90 along the edge of the city’s Warehouse District, the roar of motorcycles and cars echoes through a makeshift neighborhood of dozens of tents, mattresses and blankets. Many of those living under the highway were doing so for months before the hurricane, and while they said some things remained the same — there were no air-conditioners or refrigerators to be lost — there have also been stark differences.

The stores and bus stops where people used the bathrooms are now closed, and the city has not cleaned out the portable bathrooms under the highway that are now filled with waste. And in the days after the storm, many of the generous citizens and church workers who regularly dropped off food were unable to reach them.

Pastor Joycelyn Santee, who regularly drops off supplies for the residents here, said she had not been able to return to the area under the bridge for several days after the storm because her house lost power and she had to attend to her own family. But she was determined to return, and she and her team arrived on Saturday with trunks full of toilet paper, bags of ice, toothpaste, deodorant, food and more.

“We do whatever we can,” Ms. Santee said. “This is what we do.”


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