Hurricane Ida weakened to a Category 2 storm on Sunday night, nearly 10 hours after it made landfall.

As of 11:00 p.m. ET, the storm had maximum sustained winds of 105 mph and was moving slowly north-northwest through the state at 9 mph, according to CBS News.

The storm made landfall at 12:55 p.m. ET as an "extremely dangerous" Category 4 storm with 145 mph winds at Port Fourchon, Louisiana.

The National Hurricane Center warned throughout the day about catastrophic storm surge, extreme winds and flash flooding in southeastern Louisiana.

The storm caused widespread power outages in New Orleans and the area, leaving hundreds of thousands without power.

At least one person. has died as a result of Hurricane Ida, the Ascension Parish Sherriff's Office announced Sunday night.

"Shortly after 8:30 p.m. deputies received reports of a citizen possibly injured from a fallen tree at a residence off of Highway 621 in Prairieville," APSO said on Facebook. "Deputies arrived on scene and confirmed that the victim is now deceased."

President Joe Biden, meanwhile, approved Louisiana's disaster declaration.

"The President's action makes Federal funding available to affected individuals in the parishes of Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville, Jefferson, Lafourche, Livingston, Orleans, Plaquemines, Pointe Coupee, St. Bernard, St. Charles, St. Helena, St. James, St. John the Baptist, St. Martin, St. Mary, St. Tammany, Tangipahoa, Terrebonne, Washington, West Baton Rouge, and West Feliciana," the White House said in a statement.