And the tally could rise, Pelle acknowledged. In addition to the devastation in Superior, a town about 10 miles southeast of Boulder, the sheriff said they saw dozens of homes burned in other areas.

“I would estimate it’s going to be at least 500 homes,” Pelle said. “I would not be surprised if it’s a thousand.”

The wildfire began Thursday morning and swallowed at least 1,600 acres in a matter of hours, prompting orders for people across two communities to evacuate. Some 370 homes were destroyed in a single subdivision just west of the town of Superior, while another 210 homes may have been lost in Old Town Superior, the Boulder County sheriff said Thursday.

As quickly as the winds began, they subsided overnight and the weather started a quick swing to the other extreme: The fire-ravaged area is under a winter weather warning Friday morning, with 5 to 10 inches of snow expected to fall by Saturday, CNN meteorologist Robert Shackelford said.

Fire officials do not anticipate much more fire growth. Containment remains at 0% because fighting the Marshall Fire is different from battling other blazes, the fire’s incident commander, Michael Smith, told reporters Friday.

“This is about working around the perimeters of homes and working our way through the process,” he said. “We’re having to kind of change our thought process on what containment looks like as far as a percentage, but I do think that our forward progress is going to be very minimal from this point on.”

“We do still have active burning within the fire perimeter both in the communities of Superior and Louisville,” she said Friday morning.

‘The winds were going crazy strong’

Thursday’s event was a “truly historic windstorm,” with gusts over 100 mph in Jefferson and Boulder counties fueling the blazes, the National Weather Service said.

The mayor of Superior “witnessed houses just exploding right before our eyes” on Thursday evening, he told CNN.

“It was one of the most disturbing situations I have ever been in,” Clint Folsom said Friday.

“One minute, there was nothing. Then, plumes of smoke appeared. Then, flames. Then, the flames jumped around and multiplied,” said Boulder Heights resident Andy Thorn, who’d always worried about wildfires during periods of high wind. He watched the flames and smoke spread Thursday from his home in the foothills.

Wind gusts Thursday pushed the blaze “down a football field in a matter of seconds,” Polis said Thursday.

“There’s no way,” he said, “to quantify in any financial way, the price of a loss — of losing the chair that was handed down to you from your grandmother, of losing your childhood yearbooks, of losing your photos, of losing your computer files — which hundreds of Colorado families have experienced today with no warning.”

“Our home, cars, and everything we had in our home lost to the fires that ripped through our community,” Mark Smith tweeted. “Thank you to those who reached out. Processing how to completely start over and grateful for our health.”

Former Boulder Mayor Sam Weaver evacuated animals Thursday afternoon from the home of his brother, who with his family is out of the country, he told CNN on Friday.

“The winds were going crazy strong. We saw two different flame fronts near their house about half a mile away,” said Weaver, who’s also the former fire chief for the community of Sugarloaf.

“We spent a couple hours loading the animals into trailers and trucks and taking them away, pulling out the computer and photo albums as the flames got closer and closer,” he said. “By the time we left, say around 4, the flames were a few hundred yards away — maybe 300, 400 yards away. So, we had to leave.

“We hope the house is OK,” Weaver added, “but have no word yet today.”

‘It was just apocalyptic-feeling’

Overall, “We had 300 people overnight in shelters,” Kelly said Friday.

On Thursday at a Costco in Superior, Hunt Frye was shopping for soup for his wife when a worker told customers to evacuate. People initially were calm as they left the store, Frye said, but then took off like “antelope, running all over the place.”

“It was pretty scary. It was kind of like a life beyond a dream,” he said. “It was just apocalyptic-feeling.”

As he drove away through the haze, Frye was “trying to get out of there in a safe manner.”

“But people were running from their houses with their pet cats and, you know, everybody was very panic-stricken,” he said. “The thing that really struck me was the fear in the police officers’ face(s) who were trying to kind of get traffic going. They were legitimately scared.”

“I called my wife, and she started collecting valuables and clothes to evacuate,” Smith said. He drove through smoke on his way there and on his way back.

Across the fire zone, roads were blocked by smoke and traffic gridlock as people tried to make their way out.

The situation on the ground was “unbelievable,” Weaver told CNN.

“When you talk about what’s going on on the ground, it was really about trying to stay away from the front of the fire that was being pushed forward and get everything out that we could,” he said. “The focus was on life safety.”

Julie Tanous, an employee at a Home Depot in Louisville, watched from the store as wind and smoke blew through the area on Thursday.

“It was like a disaster movie,” Tanous told CNN Friday. She was back at the store cleaning up. Ash is everywhere, she said.

Downed power lines may be the cause

Deputies confirmed downed power lines in the fire zone, said Pelle, who cited preliminary reports in pointing to those line as the fire’s cause, with a final determination expected in the coming days. Also sparked was the Middle Fork Fire, which was quickly “laid down,” the sheriff said in a news conference.

Strong wind would make battling the fire head on a challenge, Weaver told CNN’s “New Day” Friday.

“The high wind speeds were driving embers and other flames forward so quickly,” he said, adding, “There is no way to attack it head on, that’s absolutely true. Even from the sides, you have to be careful with the swirling winds that are nearby.”

Winds had dropped by early Friday to below 20 mph, and the area is under a winter weather warning, with heavy snowfall expected by sunrise, CNN meteorologist Shackelford said.

Friday’s anticipated snowfall “comes at a good time,” Schakelford said, “since 100% of the state is under some sort of drought, and this snowfall will also help to contain the Marshall Fire.”

But while snow Friday in Colorado will help halt the wildfire’s advance, “for some people that’s going to be a problem for trying to retrieve belongings from any burned home,” Weaver said.

“If the snow falls too quickly,” he added, “it can do further damage to property.”

Recovery plans are already underway

Polis and President Joe Biden spoke Friday, the governor said, and Biden approved an expedited major disaster declaration which would be finalized later in the day.

“What that means is, it allows those who suffered loss — small businesses and homeowners — they won’t have to wait for the preliminary damage assessment for housing and small business assistance,” Polis said. “So that will be forthcoming very soon.

“And the President sends his regards to the people of Colorado and those who are directly impacted.”

At least six people had been treated Thursday for injuries related to one of the fires, a UCHealth spokesperson told CNN. A law enforcement officer suffered a minor eye injury from blowing debris.