Almost 800 rescued in St. John the Baptist Parish after Hurricane Ida

Residents who did not evacuate storm-affected regions of Louisiana are being instructed to shelter in place, as conditions are now too perilous for first responders to save them.

"There’s nobody coming right now," said New Orleans Director of Homeland Security Collin Arnold Amayor during a press conference Sunday afternoon. "You need to stay inside."

People have even been instructed to avoid going to hospitals, which are hunkering down amid the life-threatening winds and heavy rain.

"Please do not try to access a health care or hospital facility right now," said Jennifer Avegno, director of the New Orleans Health Department. "Our hospitals are hunkering down. They are caring for the patients who are within their walls…We will be there for you when the storm passes."

-ABC News’ Joshua Hoyos and Will McDuffie

There have now been two years in a row of record-breaking hurricanes making landfall in Louisiana.

Hurricane Laura in 2020 and Hurricane Ida today were both packed with 150 mph winds.

The previous hurricane to contain winds at such speeds in Louisiana was the Last Island Hurricane in 1856.

When it comes to pressure, Ida is the second-strongest storm on record to hit Louisiana, beating out only Hurricane Katrina.

-ABC News’ Melissa Griffin

Hurricane Ida made landfall near Port Fourchon, Louisiana, just before 1 p.m. as a dangerous Category 4 hurricane with maximum winds of 150 mph.

This is of the strongest hurricanes on record to hit the state of Louisiana. Hurricane Laura made landfall on Aug. 27, 2020, as a category 4 with 150 mph winds as well.

Sixteen years ago today, Aug. 29, 2005, Hurricane Katrina made landfall in Louisiana.

-ABC News’ Dan Peck