Louisiana communities battered by Hurricane Ida faced a new danger as they began the massive task of clearing debris and repairing damage from the storm: the possibility of weeks without power in the stifling, late-summer heat.

Ida ravaged the region’s power grid, leaving the entire city of New Orleans and hundreds of thousands of other Louisiana residents in the dark with no clear timeline on when power would return. Some areas outside New Orleans also suffered major flooding and structure damage.

“There are certainly more questions than answers. I can’t tell you when the power is going to be restored. I can’t tell you when all the debris is going to be cleaned up and repairs made,” Louisiana Gov. John Bel Edwards told a news conference Monday. “But what I can tell you is we are going to work hard every day to deliver as much assistance as we can.”

President Joe Biden met virtually on Monday with Bel Edwards and Mississippi Gov. Tate Reeves along with mayors from cities and parishes most impacted by Hurricane Ida to receive an update on the storm’s impacts, and to discuss how the Federal Government can provide assistance.

Read:Hurricane Ida traps Louisianans, shatters the power grid

“We are closely coordinating with state and local officials every step of the way,” Biden said.

Rescuers in boats, helicopters and high-water trucks brought hundreds of people trapped by floodwaters to safety Monday, and they planned to eventually go door to door in hard hit areas to make sure everyone got out OK. Power crews also rushed into the state.

The governor said 25,000 utility workers were on the ground in Louisiana to help restore electricity, with more on the way.

Still, his office described damage to the power grid as “catastrophic,” and power officials said it could be weeks before electricity is restored in some spots.

More than 1 million homes and businesses in Louisiana and Mississippi were left without power as Ida pushed through on Sunday with winds that reached 150 mph (240 kph). The wind speed tied it for the fifth-strongest hurricane ever to hit the mainland. By late Monday, the storm had been downgraded to a tropical depression with winds of up to 35 mph (56 kph), though forecasters still warned of heavy rain and a flood threat for parts of the Tennessee and Ohio valleys.

The storm was blamed for at least two deaths — a motorist who drowned in New Orleans and a person hit by a falling tree outside Baton Rouge.

Pamela Mitchell said Monday she was thinking about leaving New Orleans until power returned, but her 14-year-old daughter, Michelle, was determined to stay and was preparing to clean out the fridge and put perishables in an ice chest.

Read: Ida downs New Orleans power on deadly path through Louisiana

Mitchell had already spent a hot and frightening night at home while Ida’s winds shrieked, and she thought the family could tough it out.

“We went a week before, with Zeta,” she said, recalling an outage during the hurricane that hit the city last fall.

Other residents of the city were relying on generators — or neighbors who had them. Hank Fanberg said both of his neighbors had offered him access to their generators. He also had a plan for food.

“I have a gas grill and charcoal grill,” he said.

The hurricane blew ashore on the 16th anniversary of Katrina, the 2005 storm that breached New Orleans’ levees, devastated the city and was blamed for 1,800 deaths.

This time, New Orleans escaped the catastrophic flooding some had feared. But city officials still urged people who evacuated to stay away for at least a couple of days because of the lack of power and fuel.

The U.S. Environmental Protection Agency issued emergency fuel waivers for Louisiana and Mississippi, effective immediately, on Monday night. It will end on Sept. 16.

Read: No cash or gas to run from Ida: ‘We can’t afford to leave’

Some places were also dealing with water problems. Eighteen water systems were out, impacting more than 312,000 people, and an additional 14 systems affecting another 329,000 people were under boil water advisories, Edwards said Monday.

The hurricane twisted and collapsed a giant tower that carries key transmission lines over the Mississippi River to the New Orleans area, causing widespread outages, Entergy and local authorities said. The power company said more than 2,000 miles of transmission lines were out of service, along with 216 substations. The tower had survived Katrina.

The storm also flattened utility poles, toppled trees onto power lines and caused transformers to explode.

In Mississippi’s southwestern corner, entire neighborhoods were surrounded by floodwaters, and many roads were impassable. Several tornadoes were reported, including a suspected twister in Saraland, Alabama, that ripped part of the roof off a motel and flipped an 18-wheeler, injuring the driver, according to the National Weather Service.