Last week's inferno on the island of Maui is already the deadliest US wildfire in a century.
But Governor Josh Green said more fatalities are certain, as emergency responders with cadaver dogs work their way through hundreds of homes and burned-out vehicles.
"The updated number of 99 confirmed people have passed," he told CNN on Monday.
He added: "It will go up very significantly... Over the course of the next 10 days, this number could double."
The historic Maui coastal town of Lahaina was almost destroyed by the fast-moving blaze last week, with survivors saying there had been no warnings.
Green said rescue workers were finding between 10 and 20 dead bodies each day, with only a small portion of Lahaina near the waterfront searched so far.
The number of people still missing is down to around 1,300, although delays restoring cell phone communications have made it difficult for residents who fled to reconnect.
"Our hearts will break beyond repair, perhaps, if that means that many more dead. None of us think that, but we are prepared for many tragic stories," he told CBS earlier.
The town, which served as the Hawaiian kingdom's capital in the early 19th century, was home to around 12,000 residents, as well as a bustling tourist street packed with shops and restaurants.
Now, "there's nothing to see except full devastation," said Green, who has visited the smoldering streets of rubble and ash multiple times.
The intensity of the fire and scale of the destruction have made identification of human remains difficult, with some corpses disintegrating as they are uncovered by searchers.
Police are encouraging those with missing relatives to give DNA samples that might speed up the process.
"This is an amazingly devastating fire and the conditions... are extraordinarily difficult to work through," Jeremy Greenberg, a Federal Emergency Management Agency official, told a press briefing Monday.
Questions are being asked about authorities' preparedness and response to the catastrophe.
Some fire hydrants ran dry in the early stages of the wildfire as a result of the "intense operations and water usage" by firefighters, deputy US fire administrator Tonya Hoover said.
A class-action lawsuit has been filed against Hawaiian Electric, the state's biggest power firm, claiming the company "inexcusably kept their power lines energized during forecasted high fire danger conditions."
Hawaiian Electric said in a statement that the company does not comment on pending litigation, and noted that the cause of the fire has not yet been determined.
Whatever sparked the terrifying inferno, a collision of circumstances -- including a churning hurricane off the coast -- meant that it spread very quickly.
Maui suffered numerous power outages during the crisis, preventing many residents from receiving emergency alerts on their cell phones.
No sirens sounded, and many people in Lahaina learned about the blaze from neighbors running down the street or seeing it for themselves.
Attempts to allow residents back into Lahaina descended into chaos Monday, as a placard system identifying those permitted to travel was suspended after barely an hour.
"The miscommunication is abysmal -- people are very angry and frustrated, and this is getting worse," said Stephen Van Bueren, 42, a local church pastor who waited for more than an hour to get a placard, without success.
"They are restricting everyone, they are blocking access. Why are they keeping people away?"
Source: Online
BDST: 1002 HRS, AUG 15, 2023
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