NEW ORLEANS (AP) — Residents of the storm-pummeled Gulf Coast steeled themselves Tuesday for yet another tropical weather strike as Tropical Storm Zeta took aim at southeast Louisiana, fraying the nerves of evacuees from earlier storms and raising concerns in New Orleans about the low-lying city’s antiquated drainage pump system.

Zeta, the 27th named storm of a very busy Atlantic hurricane season, was a hurricane when it began raking across Mexico’s Yucatan Peninsula early Tuesday. It emerged in the Gulf of Mexico as a tropical storm but was expected to regain hurricane strength before landfall south of New Orleans on Wednesday evening.

Already this year, Louisiana has been hit by two tropical storms and two hurricanes: Laura, blamed for at least 27 Louisiana deaths after it struck in August, and Delta, which exacerbated Laura’s damage in the same area weeks later. New Orleans has been in the warning area for potential tropical cyclones seven times this year but has seen them veer to the east or west.

“I don’t think we’re going to be as lucky with this one,” city emergency director Colin Arnold said at a news conference with Mayor LaToya Cantrell. Louisiana Gov. John Bel Edwards said Tuesday he asked President Donald Trump to issue a disaster declaration ahead of the storm. Trump approved the declaration Tuesday evening.

One worry among New Orleans officials: a turbine that powers the city's street drainage pumps broke down Sunday, according to officials of the agency that runs the system. There was enough power to keep the pumps operating if needed, but it left authorities with little excess power to tap should a breakdown of other turbines occur.

Officials said they were running through contingencies to provide power and make repairs where needed should there be other equipment problems. Forecasts, meanwhile, called for anywhere from 2 to 6 inches (5 to 15 centimeters) of rain in the New Orleans area. Officials noted that Zeta is expected to be a relatively fast-moving storm, minimizing the flood threat.

Zeta had sustained winds of 65 mph (105 kph) winds and was centered 410 miles (655 kilometers) south-southwest of the Mississippi River’s mouth Tuesday afternoon. Its approach toward New Orleans meant more worries for evacuees left homeless by Laura who are sheltered in hotels. The state is sheltering about 3,600 Laura and Delta evacuees, most of them in New Orleans area hotels.

“It really is scary, and I don’t know what to do,” said Yolanda Lockett, who evacuated her Lake Charles apartment — now a rain-soaked, moldy mess — ahead of Laura at the end of August. “I’m physically and mentally tired,” she said, standing outside a New Orleans hotel.

A hurricane warning stretched from the central Louisiana coast to the Alabama state line. Edwards and Alabama Gov. Kay Ivey both declared emergencies ahead of the storm.

And commercial fishermen began a familiar hurricane preparation ritual.

“We’re getting pretty good at it for doing it five times this season so far," said Robert Campo as he readied his marina at Shell Beach for the storm. The routine includes removing gas pumps used to fuel boats, loading frozen bait onto old school buses that have been converted into mobile freezer units and tying down trash cans to keep them from floating off.

“The downfall of it is, when ... we’re down for four or five days, that’s four or five days nobody’s fishing. That’s four or five days nobody is shrimping. That’s four or five days, no economic wheels are turning.”

On Dauphin Island, off the Alabama coast, workers at Dauphin Island Marina prepared for Zeta on Tuesday even though little remained of the business to protect after it was pummeled by Sally in September.

“Right now we’re packing stuff up just to be safe," said marina employee Jess Dwaileebe. “We don’t have any docks or fuel pumps at this point. Sally took it all out.”

In Waveland, Mississippi, hardware store operator David Hubbard didn't see the usual rush of people buying storm supplies. Most have what they need because Zeta is only the latest threat, he said.

Officials in two Mexican states hit by Zeta reported power outages and damage caused by downed trees, but no deaths. The storm left sand blocking the boulevard through Cancun’s hotel strip. Pounding surf destroyed many turtle nests on Playa Ballenas, leaving eggs scattered along the beach.

Zeta broke the record for the previous earliest 27th Atlantic named storm that formed Nov. 29, 2005. It's also the 11th hurricane of the season. An average season sees six hurricanes and 12 named storms.

There have been so many storms this season that the hurricane center had to turn to the Greek alphabet after running out of assigned names.

The extraordinarily busy hurricane season has focused attention on the role of climate change, which scientists say is causing wetter, stronger and more destructive storms.

___

Santana reported from Shell Beach, Louisiana. Associated Press reporters Jay Reeves, in Birmingham, Alabama; Melinda Deslatte in Baton Rouge, Louisiana; Kevin McGill in New Orleans and Gabriel Alcocer in Cancun, Mexico, contributed to this report.