Colorado firefighters battle wildfire to a standstill

A cloud of smoke rises over the site of a forest fire near Walden, Colo., on Wednesday, June 22, 2016. A shift in the wind turned the blaze, which is burning in a heavily-wooded area with no permanent residents, into a fast-moving threat that has forced campers to evacuate from the area near the Colorado-Wyoming border. Trees killed by a beetle infestation are fueling the flames at the site, which is 140 miles north and west of Denver. (Matt Stensland/Steamboat Pilot & Today via AP) (The Associated Press)

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In this photo provided by Kiowa County, Colo., Sheriff Casey Sheridan, a railroad trestle burns near the tiny town of Haswell, Colo., Wednesday, June 22, 2016. For days, wildfires have raged amid spiking heat across Southern California and much of the West, forcing many to evacuate. (Casey Sheridan/Kiowa County, Colo., Sheriffs Department via AP) (The Associated Press)

Evacuee Kimberly Tieche holds her 10-month old puppy while listening to the briefing on a wildfire at an evacuation center, Saturday, June 25, 2016, near Kernville, Calif. Tieche whose home was devastated by the wildfire said she only had five minutes to get out. (AP Photo/Jae C. Hong) (The Associated Press)

LAKE ISABELLA, Calif. – The Latest on wildfires burning in the West (all times local):

9 a.m. MDT

A dry thunderstorm moved over a wildfire near the Colorado-Wyoming border, but it had little impact where firefighters have battled the blaze to a standstill at 8 square miles.

Fire crews are focusing on protecting buildings and reducing the risk of the fire spreading in an area of heavy timber with a high percentage of beetle kill, and in some areas of grass and sagebrush.

Officials say 40 residences or cabins remain at risk. So far, only a few structures have burned.

Helicopters were used on the fire Friday, but the weather prevented airplanes from making air drops.

Officials are worried that thunderstorms expected this weekend could bring winds that spread the flames.