BOISE, Idaho (AP) -- A fast-moving brush fire near Highway 16 and Firebird Raceway in Boise threatened structures and forced some people to evacuate their homes Tuesday, authorities said.
The Ada County Sheriff's Office said homes were being evacuated as a precaution on Chaparral Road, Spangler Place, Edgeview Road and Broadview Road. Highway 16 was closed at Beacon Light Road.
The Eagle Fire Department said about 30 structures were threatened, KBOI-TV reported (http://bit.ly/15EsaSd).
The Bureau of Land Management estimated the blaze had burned about 500 acres. Winds were blowing 10 to 30 mph in the area.
The fire is one of a handful burning across the state as dry conditions persisted and temperatures soared to near 100 degrees.
Authorities believe a wildfire that has burned nearly 2 square miles in the forest northeast of Boise is human-caused.
The Pine Creek Fire ignited Monday afternoon, and so far more than 200 firefighters have been deployed to manage the blaze. No structures are threatened by the fire, but smoke has prompted authorities to issue alerts for motorists using Highway 21 between Boise and Idaho City.
Authorities have not identified an exact cause or identified suspects, but believe the fire originated on a private camp along a county road.
Elsewhere, a lightning-caused fire has burned nearly 6 square miles of grass, brush and timber in the Salmon-Challis National Forest 40 miles west of Salmon.
Officials say the fire, which started Sunday, is burning in rugged terrain near the Middle Fork of the Salmon River that prevents the blaze from being fought on the ground. A sky crane helicopter that can drop 2,000 gallons is working on the Papoose Fire.
The Times-News reports boaters on the Middle Fork of the Salmon River may be asked to share campsites with other rafters and possibly firefighters.
Crews are also battling the Rough Creek Fire that has burned more than 4 square-miles in the Nez Perce National Forest east of the town of Riggins.