A summer of ferocious weather across much of the United States reached the country’s most remote state on Wednesday, 2,500 miles off the West Coast, in Hawaii.

What began at the start of the week as scattered brush fires on the state’s biggest islands, Hawaii and Maui, turned deadly by midweek. By Thursday, at least 55 people had been confirmed dead in the nation’s most lethal wildfire since the Camp fire in California killed 85 people in 2018.

The rapid spread of the flames caught state officials and residents by surprise.

The death toll is likely to rise.

Firefighters continued to battle flare-ups on Thursday, but the fires have been largely contained, officials said. The fires were still generating smoke and ash.

Thousands of residents and tourists have been evacuated, and U.S. Army personnel were conducting search-and-recovery efforts on Thursday, Maui County officials said. There are still many road closures on Maui and the island of Hawaii.

The death toll could rise as rescuers travel to parts of the state that have been blocked by fires or road closures. Dozens of people have also been injured, some of them critically.

“In 1960, we had 61 fatalities when a large wave came through the Big Island,” Gov. Josh Green said on Thursday in an interview with CNN, referring to the island of Hawaii. “This time, it’s very likely that our death totals will significantly exceed that.”

About 1,500 tourists were expected to leave Maui on Thursday, joining the 11,000 people who had already been evacuated. Officials strongly discouraged new arrivals.

What caused the fire?

Brush fires had already ignited on Maui and the island of Hawaii by Tuesday. Those fires were stoked on Wednesday by a combination of low humidity and strong mountain winds, brought by Hurricane Dora, a Category 4 storm that was moving hundreds of miles to the south across the Pacific Ocean. What initially ignited the brush fires is unknown.

Worsening drought conditions in recent weeks probably also contributed to the fire. Nearly 16 percent of Maui County was in a severe drought on Tuesday, an uptick from about 5 percent the week before, according to the U.S. Drought Monitor.

On Maui on Tuesday, some schools and tourist attractions were closed, and several thousand residents lost power — and were still without it as of Thursday night. The brush fires had also led to some earlier evacuations on Maui and the island of Hawaii, some of which have been lifted.

The town of Lahaina suffered the most damage.

The fires were most intense along the western coast of Maui, where there was no power, phone or cell service on Thursday morning. That side of the island is generally drier and receives less rain.

Lahaina, a coastal town of 12,000 that was once the royal capital of Hawaii, was leveled, and some residents there ran into the ocean to avoid the heat and flames. They were rescued by the U.S. Coast Guard. Survivors described fleeing for their lives from a fast-moving “total inferno.”

Mayor Richard Bissen of Maui County said on Wednesday that 1,000 acres had burned, and Governor Green said 1,700 buildings had been destroyed. There has been no word on when residents of Lahaina will be able to return to their homes.

Wildfires in the state are getting worse.

The area burned annually by wildfires in Hawaii has quadrupled in recent decades. Declining rainfall and rising temperatures have left the islands more susceptible to blazes, climatologists say.

Invasive grasses that are highly flammable have crowded out native vegetation in some areas, and climate change has exacerbated dry and hot conditions in the state, allowing wildfires to spread more quickly.

What’s next?

The state should be out of immediate danger now, with Hurricane Dora moving farther away. The winds are expected to slow on Friday and remain that way into early next week, according to the National Weather Service.

Governor Green, who had been traveling out of the state since the end of July, toured Maui on Thursday. In a short video on social media, he said the destruction was extraordinary and that well over 1,000 buildings had been destroyed.

While officials are focused on rescue operations and protecting property, an investigation on the exact causes of the disaster is likely to begin soon.

“We are still in life preservation mode,” Adam Weintraub, a spokesman for the Hawaii Emergency Management Agency, said on Thursday.