BOULDER, Colo.—Fire crews are working to build and reinforce containment lines around a wildfire burning near Lyons in Boulder County.
The Coffintop fire was about 10 percent contained Thursday.
The fire was initially thought to be burning on 40 acres but authorities now estimate it’s 20 acres.
Authorities think lightning sparked the fire on Thursday.
A 60-acre fire that started Sunday in a canyon west of Boulder is fully contained.
In southern Colorado, firefighters are mostly fighting a 7-square-mile wildfire near Westcliffe from the air. The blaze is 80 percent contained and that figure isn’t expected to increase for some time because of inaccessible terrain on the fire’s west side. That fire has been burning since June 12.
