The Stone Canyon fire remains at 1,553 acres and 30% containment, according to a Friday update from the Boulder Office of Disaster Management. 

As crews continue to fight the fire, they are keeping an eye on the weather, which may threaten to bring increased wind and thunderstorms. Wind may fan the flames of the fire and encourage fire growth. 

As the fire has not grown, the Boulder office does not expect any air support as it has been reassigned to other fires in the region with active growth. Indeed, tracking firefighting aircraft online appeared to show two tankers from the Rocky Mountain Metropolitan Airport flying north to Casper, WY, likely to fight the 23,000 acre Pleasant Valley fire.

Firefighting helicopters are working the Alexander Mountain fire, which grew to 9,000 acres and stands at 5% containment. 

Thus far, five structures have been burned by the fire, though the extent of the damage was not noted by the office online. Additionally, two firefighters have been inured as a result of the fire — but their condition was not shared.

The Denver Gazette called the Office of Disaster Management seeking clarification on structures impacted and firefighters injured, but has not yet received a response. 

The fire was first reported by Boulder Office of Disaster Management on social media at 2:45 p.m. Tuesday.

By that evening, the fire had grown to about 1,320 acres and officials expressed concerns about fire growth through the evening, which was forecast to see less than favorable weather conditions, including high winds.

Throughout the day Wednesday, firefighters worked on the ground and in the air, dropping water and slurry on hot spots.

Three members of the state’s new wildfire investigations team — made up of nine fire investigators and four dog trained to sniff out accelerants — is working to help determine the cause of the fire.

Prior to 2023, local departments in Colorado were responsible for investigating their own wildfires, but Senate Bill 23-013 was passed, allocating nearly $3 million to the state’s division of fire prevention and control within the Department of Public Safety to create the investigation unit.

The collection of wildfires will be the first major incidents since the creation of the team.

Around 10 a.m. Wednesday, an all clear was issued for northern and western parts of Lyons, telling people they could return to their homes after evacuation orders Tuesday night.

By Wednesday afternoon, more than 120 firefighters with 37 trucks were working on scene to manage the fire, which was 0% contained.

By Thursday evening, it was 20% contained, with the fire moving away from the town. As of the latest Friday update, the fire is 30% contained

One fire-related death was reported on Wednesday, officials said. No further deaths or injuries have been reported.

The Boulder Disaster Call Center, which can be reached at 303-413-7730, will be open from 9 a.m. to 3 p.m. Friday. Updates will come through boulderodm.gov or via the office’s Twitter page. Overnight updates will only be posted if significant changes occur. 

Denver Gazette reporters Kyla Pearce and Sage Kelley contributed to this story.