In New Orleans and beyond, evacuations are underway.

In New Orleans and beyond, evacuations are underway.

 With tracking maps for Hurricane Ida consistently showing an expected pathway toward southeast Louisiana, Mayor LaToya Cantrell of New Orleans issued a stern warning on Saturday that city residents who intend to leave should do so immediately.

“In no way will this storm be weakening, and there’s always an opportunity for the storm to strengthen,” Ms. Cantrell said at a news briefing. “Time is not on our side. It’s rapidly growing, it’s intensifying.”

City officials are asking that residents who plan to stay in the city prepare for extended power outages, limited emergency services and several days of high temperatures after the storm passes.

“The first 72 is on you,” said Collin Arnold, director of the New Orleans Office of Homeland Security and Emergency Preparedness. “The first three days of this will be difficult for responders to get to you.”

Forecasters are predicting that Hurricane Ida will be a Category 4 storm upon landfall on Sunday, the 16th anniversary of Hurricane Katrina, which left more than 1,800 dead.

With Hurricane Ida likely to bring powerful winds and heavy rain to their city, residents of New Orleans faced a familiar choice: flee or hunker down for the duration.

Lacy Duhe, 39, and Jeremy Housely, 42, opted to hunker down in their second-story apartment on Deslonde Street in New Orlean’s Lower Ninth Ward. If they evacuated and ended up in a shelter, they said, they worried about the risk of their unvaccinated children contracting Covid-19. They also had just paid their monthly bills and could not afford to go anywhere.

“It feels serious,” said the couple’s 11-year-old daughter, Ja-nyi. “I wasn’t born during Katrina time. But I know it knocked down a lot of places.”

Mary Picot, 71, walked out the door on Saturday afternoon carrying bags of snacks and medicine. She wasn’t worried about flooding and believed the levees would hold. It was the threat of power outages that convinced her to leave.

“My husband is diabetic,” she said. “We have to keep his medicine cold.”

Donald Lyons, 38, was packing up a silver Nissan sedan Saturday afternoon under a cloud-filled sky in Hollygrove, one of the traditionally Black working class neighborhoods that flooded badly when Katrina hit. The car, carrying his wife, three children and mother-in-law, was full of bags and bedding. They were heading to Sugar Land, Texas, 27 miles southwest of Houston, where they had family that had left after Katrina, 16 years ago, and never come back.

“I’m just trying to get somewhere safe,” Mr. Lyons said.

Down the block, Barbara Butler, 65, a housekeeper, said she thought the city was safer now with all of the new flood protection. She intended to ride out the storm at home.

“It gave us some relief,” she said. “It’s better than no relief.”

She was sitting on the porch with her husband, Curtis Duck, 63, and her brother, Ray Thomas, in a house that Ms. Butler said was flooded with eight feet of water after Katrina.

Mr. Duck said he was sick of evacuating time and again.

“We listen to the news,” he said. “People telling us to go, go, go.”

Victor Pizarro, a health advocate, and his husband decided to ride out the storm in their home in the Gentilly Terrace neighborhood, although they said they would leave town if they lost power for an extended period.

“It’s definitely triggering to even have to think about this and make these decisions,” Mr. Pizarro said in a telephone interview while he drove across town in search of a spare part for his generator. “It’s exhausting to be a New Orleanian and a Louisianian at this point.”

Andy Horowitz and his family decided to vacate their home in the Algiers Point neighborhood, which sits directly across the Mississippi River from the French Quarter. Mr. Horowitz is the author of “Katrina: A History, 1915-2015,” and he is among those scholars and Louisiana residents who fear that the city’s new flood protection system, as massive as it is, may prove to be inadequate for a sinking city in the likely path of more frequent and powerful storms in the age of climate change.

“Every summer, New Orleans plays a game of Russian roulette, and every summer we pull the trigger,” Mr. Horowitz said.

“What we learned during Hurricane Katrina is we are all first-responders,” Ms. Cantrell said. “It’s about taking care of one another.”

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