The US toll from the Category 4 hurricane stood at 14 deaths, with more than half of those killed by carbon monoxide poisoning from the unsafe operation of generators.
US president Donald Trump plans to tour the damage in Louisiana and neighbouring Texas.
He told reporters he considered delaying his Thursday night speech accepting the Republican Party’s nomination for re-election because of the storm, but said that “it turned out, we got a little bit lucky. It (the storm) was very big, it was very powerful, but it passed quickly”.
Across south-western Louisiana, people are cleaning up from the destructive hurricane that roared ashore early on Thursday, packing 150mph winds.
Many people are deciding whether they wanted to stay in miserable conditions or wait until basic services are finally restored.
Simply driving was a feat in Lake Charles, a city of 80,000 residents hit head-on by the hurricane’s eye. Power lines and trees blocked paths or created one-lane roads that drivers had to navigate with oncoming traffic.
Street signs were snapped off their posts or dangling. No stop lights worked, making it an exercise in trust with other motorists sharing the roads.
Mayor Nic Hunter cautioned that there was no timetable for restoring electricity and that water-treatment plants “took a beating”, leaving barely a trickle of water coming out of most taps.
“If you come back to Lake Charles to stay, make sure you understand the above reality and are prepared to live in it for many days, probably weeks,” Mr Hunter wrote on Facebook.
Caravans of utility trucks were met on Friday by thunderstorms in the sizzling heat, complicating recovery efforts.
The Louisiana Department of Health estimated that more than 220,000 people were without water. Restoration of those services could take weeks or months, and full rebuilding could take years.
I appreciate the quick action @POTUS took on my request for a Major Disaster Declaration, which will pave the way for getting aid to individuals and communities impacted by Hurricane #Laura in Louisiana. https://t.co/uBoGU3BDPj #lagov #HurricaneLaura
— John Bel Edwards (@LouisianaGov) August 29, 2020
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Forty nursing homes were relying on generators, and assessments are under way to determine if more than 860 residents in 11 facilities which had been evacuated could return.
The much weaker remnants of the hurricane continued to move across the southern US, unleashing heavy rain and isolated tornadoes.
North Carolina and Virginia could get the brunt of the worst weather on Saturday, forecasters said.
When the storm moves back over the Atlantic Ocean, forecasters said it could become a tropical storm again and threaten Newfoundland, Canada.
Louisiana governor John Bel Edwards called Laura the most powerful hurricane to strike the state, meaning it surpassed even Katrina, which was a Category 3 storm when it hit in 2005.
He said officials now believe the surge was as high as 15 feet.
The hurricane also killed nearly two dozen people in Haiti and the Dominican Republic en route to the Gulf Coast.
