It was one of the strongest hurricanes on record -- by both wind speed and pressure -- to roar ashore in Louisiana.
Ida, now a tropical storm, is hitting on the 16-year anniversary of Katrina, a Category 3 hurricane that ravaged the Gulf Coast. Hurricane Katrina unleashed a series of events, taking the lives of more than 1,800 people and leaving more than $100 billion worth of damage in its wake.
Here are the latest developments. All times Eastern.
Aug 30, 2021, 11:32 AM EDT
Ida's latest forecast from South to Northeast
Tropical Storm Ida, now about 40 miles southwest of Jackson, Mississippi, is still bringing flash flood warnings to Louisiana, Mississippi and Alabama on Monday.
Flooded streets are pictured after Hurricane Ida made landfall in Louisiana, in Kenner, La., Aug. 30, 2021.
Marco Bello/Reuters
Up to 18 inches of rain has pummeled Louisiana. Up to 9 inches fell in Mississippi.
A man helps a stranded motorist in floodwaters on Beach Blvd., Aug. 30, 2021 in Biloxi, Miss.
Sean Rayford/Getty Images
A tornado watch remains in effect in Mississippi, Alabama and Florida.
By Tuesday, Ida will move northeast into the Tennessee River Valley.
By Wednesday night into Thursday, Ida will track into the Northeast, dropping up to 6 inches of rain. Major flooding is possible along the Interstate 95 corridor from New York City to Philadelphia.
-ABC News' Max Golembo
Aug 30, 2021, 10:29 AM EDT
Historic landmark tied to Louis Armstrong collapses
The Karnofsky Tailor Shop, a historic national landmark in New Orleans, is one of the multiple buildings that collapsed when Ida walloped the city.
The brick two-story shop, a former tailor business in the Central Business District of the city, dates back to 1913 and is where Louis Armstrong worked before embarking on his legendary jazz career.
A group of people walk through the French District during Hurricane Ida, Aug. 29, 2021 in New Orleans.
Brandon Bell/Getty Images
The family that owned the shop provided a second home for Armstrong and loaned him money to purchase his first cornet, according to the National Park Service.
-ABC News' Ginger Zee
Aug 30, 2021, 10:17 AM EDT
Governor expects death toll to go up 'considerably'
Louisiana Gov. John Bel Edwards told MSNBC Monday that search and rescue efforts are ongoing and he expects Ida's death toll to "go up considerably throughout the day."
Helicopters are surveying damage because it will take “many days” to reach Louisiana's southern coastal areas by ground, he said.
Nearly all of southeast Louisiana is without power, the governor said. All eight major lines that feed electricity to the New Orleans area have failed.
Downtown buildings relying on generator power are seen as the entire city of New Orleans is without power in the aftermath of Hurricane Ida in New Orleans, Aug. 30, 2021.
Gerald Herbert/AP
-ABC News' Josh Hoyos
Aug 30, 2021, 9:50 AM EDT
FEMA administrator says Ida caused 'major damage'
FEMA administrator Deanne Criswell called Ida "one of the most catastrophic hurricanes to make landfall" in the Gulf Coast region and said the storm left multiple collapsed buildings in its wake, particularly in the area of Baton Rouge.
"Some of the initial reports that we're hearing are some building collapses across the area, significant structural damage to many buildings," Creswell said Monday on "Good Morning America." "We're seeing some barges and some vessels that may have been broken loose and we're also experiencing over a million power outages right at the moment."
New Orleans Police detective Alexander Reiter, looks over debris from a building that collapsed during Hurricane Ida in New Orleans, Aug. 30, 2021.
Gerald Herbert/AP
Criswell said emergency teams were heading out on search-and-rescue missions after receiving reports of people trapped in their homes by flooding.
"This is significant. There is major damage," Criswell said. "We've got a lot of resources in place to support the state."
Criswell added that "my biggest concern is still the fragility of our health care system."
"It has been stressed from COVID-19 and the occupancy has been full," said Criswell.
Bourg fire chief TJ Pellegrin asks a couple if they are okay after Hurricane Ida passed in Bourg, La., Aug. 29, 2021.
Mark Felix/AFP via Getty Images
She said some hospitals in the hardest-hit areas of Louisiana were operating on backup generators.
Criswell said the good news is that it appears levees in southeast Louisiana, particularly those around New Orleans, held up through the storm.
"We knew there could be some in the southern parts of Louisiana that would overtop and those are areas that did have a mandatory evacuation order in place," Criswell said. "But we brought in search and rescue assets, power restoration teams, food and water to support the shelter operations."
