The fire started north of Jamestown on Saturday lunchtime, according to Gabi Boerkircher, spokeswoman for the Boulder Officer of Emergency Management. Almost 900 houses are in the evacuation area, a tweet from the Boulder Office of Emergency Management said on Saturday evening.
Jamestown is at the foot of the Rocky Mountains, about 14 miles northwest of Boulder and about 43 miles northwest of Denver.
The fire is being pushed to the southeast by the wind, said Boerkircher.
“We’re asking people pretty much everywhere nearby to be sure they are making an evacuation plan,” Boerkircher said, adding that a local disaster declaration was signed around 1:30 p.m. local time in response to the fire.
Evacuations have been ordered for Jamestown and pre-evacuation orders are in place for areas south of the city, Boerkircher said.
No deaths or injuries have been reported and a cause of the Calwood fire has not yet been determined, Boerkircher said.