The death toll from Hurricane Ian has reportedly risen to nearly 100 in Florida as rescue personnel continue to search for survivors.
Officials in the US state have come under fire as critics allege residents in some hard-hit areas did not receive enough advance warning to evacuate.
More than half of the deaths recorded are in Lee County, where Ian made landfall as a Category 4 hurricane.
President Joe Biden is expected to visit Florida on Wednesday.
On Monday, Mr Biden visited Puerto Rico - which was struck by Hurricane Fiona just days before Ian struck Florida - where he promised $60m (£53m) in aid to help the US territory.
"We're going to make sure you get every single dollar promised," he said in the municipality of Ponce, parts of which were still without power.
According to the BBC's US partner network CBS, the hurricane's death toll in Florida climbed to at least 99 on Monday night. Another four deaths have been confirmed in North Carolina.
Florida officials said the latest death toll is at least 68. The figures differ as while local officials may report additional storm-related deaths, the medical examiner's officer is only attributing a death to the hurricane after an autopsy is performed.
The majority of the deaths - 54 - have been reported in Lee County, which includes the hard-hit areas Fort Myers, Sanibel and Pine Island, Sheriff Carmine Marceno said at a news conference.
Mr Marceno said access to the Fort Myers beach area was being restricted to allow authorities to investigate deaths and to preserve potential crime scenes. He added that several arrests had been made after looting incidents were reported.
On Friday, Florida governor Ron DeSantis described the county as "ground zero" for the hurricane.
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Confusion over death tolls is common in the wake of hurricanes. In 2020, for example, fewer than 20 deaths were reported from Hurricane Laura days after it made landfall in Louisiana - a figure which the National Hurricane Center later revised to 47.
While the death toll from Hurricane Ian already makes it one of the deadliest hurricanes in recent memory, it still pales in comparison to 2005's Hurricane Katrina, which killed more than 1,800 people.
In the wake of the storm, officials in Lee County have faced questions about the timing of their evacuation order, which was issued on 27 September, less than 24 hours before Ian made landfall. Several other counties in the path of the incoming hurricane issued their own evacuation orders a day before.
Local officials, as well as Florida's Governor Ron DeSantis, have defended Lee County's preparations for the hurricane.
"Everyone wants to focus on a plan that might have been done differently," Mr Marceno said on Sunday. "I stand 100% with my county commissioners, my county manager. We did what we had to do at the exact same time. I wouldn't have changed anything."
A 2015 planning document on the official website of Lee County's government notes that "due to our large population and limited system, Southwest Florida is the hardest place in the country to evacuate in a disaster." The document adds that evacuation decision-making procedures consider "evacuation risks, the disruption to both the lives of our residents/visitors, businesses and the potential magnitude of the impending threat".
The death toll cited by Florida officials does not include at least 16 Cuban migrants who remain missing after their boat capsized off the state's coastline during the hurricane. Of the 27 people on board, nine were rescued by the US Coast Guard and two managed to swim ashore at Stock Island, near Key West, The bodies of two more who died have been recovered. The Coast Guard has suspended the search for those still missing.
Approximately 451,000 homes and businesses remain without power across the state, according to data from poweroutage.us.
The utility company with the largest number of outages, Florida Power & Light Co, said that the majority of customers will have their power restored by 7 October, but that storm damage has made some properties "unable to safely accept power".
While officials are still assessing the damage caused by the hurricane across the state, experts have warned that the economic cost could ultimately rise to tens of billions of dollars. So far, insurers have reported about $1.44bn (£1.28bn) in preliminary claims.
A preliminary forecast from data firm Enki Research published on 1 October estimated that total damages will amount to at least $66bn, but could rise as high as $75bn.