UPDATE, Wednesday, 4:30 p.m.: Evacuations were lifted and residents were allowed to return to their homes, though some may still be without power, fire officials said.
A 115-acre brush fire burning in Marin County prompted evacuations as it threatened dozens of structures late Tuesday, according to the county fire department.
The Irving Fire sparked in the area of Samuel P. Taylor State Park Monday night and crews were having difficulties accessing the flames due to rough terrain, fire officials said. The blaze was 35 percent contained as of Tuesday afternoon.
About 150 structures are threatened by the blaze, but none of those structures have been damaged as of Tuesday, officials said. The threats to the homes are decreasing, according to fire officials.
No injuries were immediately reported.
Evacuation orders are in effect for Mountain King Road, Portola Avenue and Alamo Road down to Barranca Road, fire officials said. Evacuees should make their way to Lagunitas School, officials said.
Officials have closed all of Arroyo Road along with Sir Francis Drake Boulevard between Nicasio Valley Road and Platform Bridge Road.
Lagunitas School is closed Tuesday, according to fire officials. The school has not been damaged, but many staff members and students are under evacuation orders and are unable to make it to the campus.
No further details were available.