The Electra Fire, burning in the Sierra Nevada foothills of Amador and Calaveras counties, is now the second-largest wildfire of the season in California.
As of Thursday morning, the area burned was 4,272 acres (6.7 square miles), according to the California Department of Forestry and Fire Protection. Containment was at 40%.
The fire started on Monday afternoon along the North Fork of the Mokelumne River. The cause has not been determined, CalFire said.
No structure was damaged. An injured firefighter has been reported.
Evacuation orders remained in place Thursday for parts of Amador and Calaveras counties. The map above shows the approximate mandatory evacuation zone in red and the warning zones in yellow. The black line shows the approximate perimeter of the fire.
Amador County’s official evacuation orders and warnings map can be found here, and that of adjacent Calaveras County here. Both have address search fields.
The largest California wildfire so far this year is Lost Lake, which started May 26 along the Colorado River north of Blythe. It burned 5,856 acres. No structure was destroyed.
Before Electra, the second largest was the Airport Fire, which started Feb. 16 near Bishop Airport and burned 4,136 acres.
This time last summer, crews were battling three fires that broke out in late June in the Mount Shasta area: Lava and Tennant in Siskiyou County and Salt in Shasta County. They would burn nearly 40,000 acres combined. In their early stages, two fires were started by 4th of July lightning: Beckwourth Complex (105,670 acres) and Tamarack (68,637).
Last season’s largest fire, Dixie (963,309 acres), started July 13 and was brought under control October 25.
The Electra Fire is within the Butte Fire footprint of 2015, which burned 70,868 acres (111 square miles) and destroyed 877 structures. Two residents were killed in the fire.