The death toll in Hawaii from the deadliest U.S. wildfire in more than a century ticked toward 100 Sunday, fueling criticism that government inaction contributed to the heavy loss of life.

At least 96 people were confirmed to have died as of Sunday night, but officials warned the figure was likely to rise as recovery crews with cadaver dogs work their way through hundreds of homes and burned-out vehicles in Lahaina. 

The historic coastal town on the island of Maui was almost entirely destroyed by the fast-moving inferno Tuesday and Wednesday, with survivors saying there had been no warnings.

When asked Sunday why none of the island's sirens had been activated, Hawaii Senator Mazie Hirono said she would wait for the results of an investigation announced by the state's attorney general.

"I'm not going to make any excuses for this tragedy," Hirono, a Democrat, told CNN's "State of the Union."

"We are really focused, as far as I'm concerned, on the need for rescue, and, sadly, the location of more bodies."

Rep. Jill Tokuda, of Hawaii, said on the CBS News broadcast "Face the Nation" Sunday that the state's warning sirens "likely did not go off" in Maui as the fire raced toward Lahaina.

Tokuda, a Democrat whose district includes Maui said, "Everybody who has ever lived in Hawaii knows the warning sirens. It goes off once a month, every month, at 12 noon and it blares. And if it doesn't, it gets fixed because that is our first line of defense."

She also suggested that warning signals typically sent to mobile phones could have been affected by mass power outages reported on Maui, which was experiencing extremely windy conditions when the wildfires broke out. Those outages likely prevented people from accessing useful information about the nature of the warning and guidance on how they should proceed.

• How did the Maui fire start? What we know about the cause of the Lahaina blaze

Gov. Josh Green said Sunday that some 2,700 structures were destroyed in Lahaina with an estimated value of $5.6 billion.

Thousands were left homeless.

"The remains we're finding is through a fire that melted metal," Maui Police Chief John Pelletier said during a news conference Saturday. "... When we pick up the remains ... they fall apart."

That was making identification difficult, he said, appealing for those with missing relatives to give DNA samples that might speed up the process.

Pelletier said cadaver dogs still had a vast area to search for what could still be hundreds of people who are unaccounted for.

"We're going as fast as we can. But just so you know, 3% — that's what's been searched with the dogs," he said during Saturday's briefing, referring to the portion of Lahaina that had been systematically checked by crews so far.

Clint Hansen provided an aerial view of some of Lahaina:

The wildfire is the deadliest in the United States since 1918, when 453 people died in Minnesota and Wisconsin, according to the nonprofit research group the National Fire Protection Association.

The death toll in Maui surpassed the 2018 Camp Fire in California, which virtually wiped the small town of Paradise off the map and killed 86 people.

The wildfires make up the deadliest natural disaster in Hawaii since it became a state in 1959.

Questions are being asked about how prepared authorities were for the catastrophe, despite the islands' exposure to natural hazards such as tsunamis, earthquakes and violent storms.

In its emergency management plan last year, the state of Hawaii described the risk wildfires posed as "low."

Yet the layers of warning intended to buffer a citizenry if disaster strikes appear not to have operated.

Maui suffered numerous power outages during the crisis, preventing many residents from receiving emergency alerts on their cellphones.

No emergency sirens sounded and many Lahaina residents spoke of learning about the blaze from neighbors running down the street or seeing it for themselves.

"The mountain behind us caught on fire and nobody told us jack," resident Vilma Reed, 63, told Agence France-Presse.

"You know when we found that there was a fire? When it was across the street from us."

Reed, whose house was destroyed by the blaze, said she was dependent on handouts and the kindness of strangers, and was sleeping in a car with her daughter, grandson and two cats.

The New York Times reported Sunday that firefighters sent to tackle the flames found some hydrants had run dry.

"There was just no water in the hydrants," the paper quoted firefighter Keahi Ho as saying.

The congregation of Grace Baptist Church, which was leveled in the blaze, gathered Sunday in a coffee shop in Kahului for two hours of solace.

Pastor Arza Brown led the service in his sandals, the only shoes that survived the blaze that destroyed his house.

But the trappings of ministry were far from his mind as he comforted fellow evacuees.

"That's one thing about getting together today — just to be with each other and encourage each other," he said.

For some survivors, the difficult days after the tragedy were being worsened by what they see as official intransigence, with roadblocks preventing them from getting back to their homes.

Maui police said the public wouldn't be allowed into Lahaina while safety assessments and searches were ongoing — even some of those who could prove they lived there.

Maui's fires follow other extreme weather events in North America this summer, with record-breaking wildfires still burning across Canada and a major heat wave baking the U.S. Southwest.

Europe and parts of Asia have also endured soaring temperatures, with major fires and floods wreaking havoc.

Scientists say human-caused global warming is exacerbating natural hazards, making them both more likely and more deadly.

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• Hawaii Wildfires
• Maui
• Hawaii