According to investigators, the Mile Marker 14 fire, which has consumed more than 4,400 acres east of Boise, was human-caused.
Touched off on Tuesday, the fire has since knocked out electricity to thousands of Idaho Power customers, destroyed three structures and threatened nearly a dozen more in the Robie Creek area.
By sunrise Wednesday, firefighters said they had made good progress on the blaze, but expected to be on the front lines of the wildfire, which continues to burn near Hilltop Station on Idaho Highway 21. Cameras from Idaho Transportation Department were able to capture some images Tuesday of flames building on both sides of the highway.
The Ada County and Boise County sheriff's offices have closed Rocky Canyon Road and all trails east to Highway 21 from Rocky Canyon. The public is being warned that heavy smoke, a steady stream of emergency traffic and low-flying aircraft are to be expected, and the area should be avoided if at all possible.
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Boise National Forest
The Pioneer Fire is burning eight miles north of Idaho City.
Meanwhile, the Boise National Forest has issued an area closure as a result of the Pioneer Fire, burning eight miles north of Idaho City.
Roads and trails running from Bear Run Road to Main Street in Idaho City have been closed until further notice.
Now in its third day, more than 200 firefighters are working the Pioneer Fire, which has grown to 511 acres of forest. Fire officials said they're requesting additional resources, including four new hotshot crews to help tackle the blaze.
Boise Police are asking anyone who may have seen suspicious vehicles or activity in the area during the night of Oct. 25 or the early morning of Oct. 26 to call Crime Stoppers at 208-343-COPS, or use the P3 Tips app.