Michael Richard of Creole Cuisine Restaurant Concepts boards up Crescent City Pizza on Bourbon Street in the French Quarter before landfall of Hurricane Ida in New Orleans, Saturday, Aug. 28, 2021. Richard said the group is planning to board up and protect 34 restaurants owned by the company for the storm. Credit: AP Photo/Matthew Hinton

Weather forecasters warned residents along Louisiana's coast to rush preparations Saturday in anticipation of an intensifying Hurricane Ida, which is expected to bring winds as high as 140 mph (225 kph) when it slams ashore on Sunday.

Authorities called a combination of voluntary and mandatory evacuations for cities and communities across the region. In New Orleans the mayor ordered a mandatory evacuation for areas outside the city's and a voluntary evacuation for residents inside the levee system. But since the storm quickly escalated in intensity, Mayor LaToya Cantrell said it was not possible to order a mandatory evacuation for the entire city, which would require using all lanes of some highways to leave the city.

Traffic was heavy on westbound routes out of town early Saturday and gas stations were busy.

The storm is expected to make landfall on the exact date Hurricane Katrina devastated a large swath of the Gulf Coast 16 years earlier. But whereas Katrina was a Category 3 when it made landfall southwest of New Orleans, Ida is expected to reach an extremely dangerous Category 4 hurricane, with top winds of 140 mph (225 kph) before making landfall likely west of New Orleans late Sunday.

"Today is it," Jamie Rhome, acting deputy director of the U.S. National Hurricane Center in Miami, said Saturday. "If you're in coastal Louisiana and Mississippi, you really, really have to get going because today is it in terms of protecting life and property."

Clouds pass by the Central Business District (CBD) including the Superdome before Hurricane Ida makes landfall in New Orleans, Saturday, Aug. 28, 2021. Residents across Louisiana's coast are taking one last day to prepare for what is being described as a "life-altering" Hurricane Ida. The storm is expected to bring winds as high as 140 mph (225 kph) when it slams ashore. Credit: AP Photo/Matthew Hinton

Ida intensified rapidly Friday from a to a hurricane with top winds of 80 mph (128 kph) as it crossed western Cuba. It's expected to pick up steam as it goes over the warm waters of the Gulf of Mexico.

On Saturday morning, Ida was centered 440 miles (710 kilometers) southeast of New Orleans. It was traveling northwest at 16 mph (26 kph), forecasters said. It's maximum sustained winds had increased to 85 mph (140kph).

In New Orleans, said residents need to be prepared for prolonged power outages, and asked elderly residents to consider evacuating. Collin Arnold, the city's emergency management director, said the city could be under high winds for about ten hours. Earlier Friday, Cantrell called for a mandatory evacuation for residents outside the city's levee protections—a relatively small sliver of the city's population.

Michael Richard of Creole Cuisine Restaurant Concepts boards up Crescent City Pizza on Bourbon Street in the French Quarter before landfall of Hurricane Ida in New Orleans, Saturday, Aug. 28, 2021. Richard said the group is planning to board up and protect 34 restaurants owned by the company for the storm. Credit: AP Photo/Matthew Hinton

Ida would be the latest test of the New Orleans' aging street drainage system. In a statement Friday, the city outlined steps it was taking to ensure that pumps were working and power sources to those pumps were ready. But, the amount of rain could be enough to overwhelm even a fully functional system.

"We want to be clear, that with the amount of rain now forecasted, approximately 10 inches over the course of the event, it is likely that we will experience flooding," the city said in a late Friday statement.

Some ordinarily bustling businesses were closed Saturday. One popular breakfast spot was locked up tight with sandbags against the door to guard against .

With the storm's forward speed slowing down and the intensity picking up, the storm surge may overtop some levees that protect parts of New Orleans on the west bank of the Mississippi River, said Heath Jones, emergency manager, of the Army Corps of Engineers' New Orleans District. However he said they are designed to be overtopped and have protections in place to prevent more damage. There does not appear to be any danger of storm surge coming over the levees that protect the city's east bank, which makes up most of the city, he said.

Gregory Moore, right, helps a local residents fill sand bags as they prepare for the expectd arrival of Hurricane Ida Saturday, Aug. 28, 2021, in Gulfport, Miss. Credit: AP Photo/Steve Helber

Across the region, residents were filling sandbags, getting gas for cars and generators and stocking up on food. Capt. Ross Eichorn, a fishing guide on the coast about 70 miles (112 kilometers) southwest of New Orleans, said he fears warm Gulf waters will "make a monster" out of Ida.

"With a direct hit, ain't no telling what's going to be left—if anything," Eichorn said. He added: "Anybody that isn't concerned has got something wrong with them."

A hurricane warning was issued for most of the Louisiana coast from Intracoastal City to the mouth of the Pearl River. A tropical storm warning was extended to the Mississippi-Alabama line.

At the same time hospitals are preparing for the storm, they are still dealing with a fourth surge of the coronavirus. Officials decided against evacuating New Orleans hospitals. There's little room for their patients elsewhere, with hospitals from Texas to Florida already packed with patients, said Dr. Jennifer Avengo, the city's health director.

Local residents fill sand bags as they prepare for the expected arrival of Hurricane Ida Saturday, Aug. 28, 2021, in Gulfport, Miss. Credit: AP Photo/Steve Helber

At the state's largest hospital system, Ochsner Health System, officials ordered 10 days worth of fuel, food, drugs and other supplies and have backup fuel contracts for its generators. One positive was that the number of COVID-19 patients had dropped from 988 to 836 over the past week—a 15% decline.

President Joe Biden approved a federal emergency declaration for Louisiana ahead of the storm. White House press secretary Jen Psaki said FEMA plans to send nearly 150 medical personnel and almost 50 ambulances to the Gulf Coast to assist strained hospitals.

Ida made its first landfall Friday afternoon on Cuba's southern Isle of Youth. The Cuban government issued a hurricane warning for its westernmost provinces, where forecasters said as much as 20 inches (50 centimeters) of rain could fall in places, possibly unleashing deadly flash floods and mudslides. Landfall in the U.S. is expected late Sunday in the Mississippi River delta region.

  • Ray Guenther, 55, bottom right, helps his brother, John, 56, unload about 400 crab traps that he had to pull out of the water and move via flatbed trailer to dry land near his home in eastern St. Bernard Parish as the Louisiana coast prepares for the arrival of Hurricane Ida on Friday, Aug. 27, 2021 in New Orleans. Hurricane Ida struck Cuba on Friday and threatened to slam into Louisiana with devastating force over the weekend, prompting New Orleans' mayor to order everyone outside the protection of the city's levees to evacuate.Credit: Chris Granger/The Times-Picayune/The New Orleans Advocate via AP

  • A resident takes home sandbags from a city run sandbag distribution location at the Dryades YMCA along Oretha Castle Haley Blvd., Friday, Aug. 27, 2021, in New Orleans, as residents prepare for Hurricane Ida. Credit: Max Becherer/The Times-Picayune/The New Orleans Advocate via AP

  • St. Bernard Parish residents fill up their cars and gas cans as the Louisiana coast prepares for the arrival of Hurricane Ida on Friday, Aug. 27, 2021 in New Orleans. Hurricane Ida struck Cuba on Friday and threatened to slam into Louisiana with devastating force over the weekend, prompting New Orleans' mayor to order everyone outside the protection of the city's levees to evacuate.Credit: Chris Granger/The Times-Picayune/The New Orleans Advocate via AP

  • Clouds pass by the Central Business District (CBD) including the Superdome before Hurricane Ida makes landfall in New Orleans, Saturday, Aug. 28, 2021. Residents across Louisiana's coast are taking one last day to prepare for what is being described as a "life-altering" Hurricane Ida. The storm is expected to bring winds as high as 140 mph (225 kph) when it slams ashore. Credit: AP Photo/Matthew Hinton

  • Gary Sullivan, of Gulf Hills, fills extra gas containers at Marathon Gas, Friday, Aug. 27, 2021, in Ocean Springs, Miss., in preparation for Hurricane Ida. Credit: Hannah Ruhoff/The Sun Herald via AP

  • Corey Williams, right, and John Smith, both of Pelican Ice, hurriedly stack bags of ice into a gas station freezer in preparation for Tropical Storm Ida on Friday, Aug. 27, 2021 in Jefferson, La. Forecasters now say Ida could be a major Category 3 hurricane with top winds of 115 mph when it nears the U.S. coast. Credit: Chris Granger/The Times-Picayune/The New Orleans Advocate via AP

  • A crew with the Flood Protection Authority East remove wall barriers Friday, Aug. 27, 2021, in New Orleans, that will allow the flood gates at Downman Road to be closed in coming days in anticipation of Tropical Storm Ida. Credit: Max Becherer/The Times-Picayune/The New Orleans Advocate via AP

  • Long lines are seen at a gas station in Jefferson, La., as people prepare for the arrival of Hurricane Ida on Friday, Aug. 27, 2021. Forecasters now say Ida could be a major Category 3 hurricane with top winds of 115 mph when it nears the U.S. coast. Credit: Chris Granger/The Times-Picayune/The New Orleans Advocate via AP

  • This GOES-16 East GeoColor satellite image taken Friday, Aug. 27, 2021, at 4:40 p.m. EDT, and provided by NOAA, shows Hurricane Ida crossing western Cuba. Hurricane Ida struck Cuba on Friday and threatened to slam into Louisiana with far greater force over the weekend, prompting New Orleans' mayor to order everyone outside the protection of the city's levees to evacuate. Credit: NOAA via AP

  • Storm clouds pass overhead as St. Bernard Parish road crews shore up levees and vulnerable roadways with gravel as the Louisiana coast prepares for the arrival of Hurricane Ida on Friday, Aug. 27, 2021 in New Orleans. Hurricane Ida struck Cuba on Friday and threatened to slam into Louisiana with devastating force over the weekend, prompting New Orleans' mayor to order everyone outside the protection of the city's levees to evacuate.Credit: Chris Granger/The Times-Picayune/The New Orleans Advocate via AP

  • Westbound I-10 traffic on the Bonnet Carré Spillway is slow going at 4:00 a.m. near Kenner, La. Saturday, Aug. 28, 2021, as many New Orleans area residents evacuate ahead of Hurricane Ida. Residents across Louisiana's coast are taking one last day to prepare for what is being described as a "life-altering" Hurricane Ida. The storm is expected to bring winds as high as 140 mph (225 kph) when it slams ashore. Credit: David Grunfeld, NOLA.com/The Times-Picayune/The New Orleans Advocate via AP

  • Local residents fill sand bags as they prepare for the expected arrival of Hurricane Ida Saturday, Aug. 28, 2021, in Gulfport, Miss. Credit: AP Photo/Steve Helber

If that forecast holds true, Ida would hit 16 years to the day that Hurricane Katrina made landfall with 125 mph (201 kph) winds near the riverside community of Buras.

Katrina is blamed for an estimated 1,800 deaths from the central Louisiana coast to around the Mississippi-Alabama state line. A massive scoured the shores and wiped houses off the map. In New Orleans, failures of federal levees led to catastrophic flooding. Water covered 80% of the city and many homes were swamped to the rooftops. Some victims drowned in their attics. The Superdome and New Orleans Convention Center became scenes of sweltering misery as tens of thousands were stranded without power or running water.

Additionally, the hurricane center said a new tropical depression formed early Saturday. It was centered 820 miles (1,320 kilometers) east-southeast of the Leeward Islands. It was expected to remain over the open Atlantic Ocean and posed no hazards to land.