Firefighters battling the CalWood and Lefthand Canyon fires in Boulder County made “progress” on Monday with aircraft fire retardant drops made on the northside of Calwood and helicopter water drops made in the interior of Lefthand.
The CalWood fire, which started Saturday about three miles northwest of Jamestown, had burned 9,365 acres, more than 14 square miles, and the fire is 17% contained, fire officials said in a Tuesday morning update.
Fire ground crews on Monday monitored for spot fires on the northside, in the South St. Vrain drainage, fire officials said. Containment lines were built along the southwestern edge of the fire in an attempt to “connect” CalWood with the 2003 Overland fire burn scar where fuels are relatively minimal.
Fire command plans to use aircraft again on Tuesday weather permitting.
Fire ground crews at Lefthand Canyon on Monday constructed fire containment lines in areas where fire retardant drops were made on Sunday, officials said.
Lefthand Canyon firefighters will continue building and improving containment lines Tuesday.
The Lefthand Canyon fire, which started on Sunday about one mile east of Ward, is 470 acres and 4% contained as of Tuesday morning, according to InciWeb.
Cloudy skies over the fire areas should help firefighters Tuesday morning, but sunny skies are expected in the afternoon, according to weather forecasters. Moring winds along higher peaks are in the 15 to 25 mph range and the wind is expected to back off in the afternoon. Temperatures will be in the 70s at lower elevations, with 50s to low 60s at upper elevations. A cold front is expected to settle in at about dusk.
The Colorado Department of Public Health and Environment has issued an air quality alert, because of smoke from the fires, through 4 p.m. Tuesday. Areas under the Action Day for Particulates alert are: Boulder, Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Larimer, and Weld counties.
Health officials advise people to stay indoors if smoke becomes thick in their neighborhoods and around their homes.
The cause of both fires are under investigation.
Click markers for details, use buttons to change what wildfires are shown. Map data is automatically updated by government agencies and could lag real-time events. Incident types are numbered 1-5 — a type 1 incident is a large, complex wildfire affecting people and critical infrastructure, a type 5 incident is a small wildfire with few personnel involved. Find more information about incident types at the bottom of this page.
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