A wildfire west of Nogales has grown to about 4,800 acres, officials said Thursday night.
The La Sierra Fire, which crossed from Mexico into Arizona on May 16 is burning in oak grassland and brush. The fire is human caused, according to a news release from the U.S., Forest Service.
There are 215 people assigned to the fire, including four hotshot crews. There are also eight engines, one water tender and three helicopters working the fire.
On the U.S. side, the fire is burning on Coronado National Forest lands east of the Summit Motorway trail, west of Walker Canyon and south of Ruby Road.
The fire's perimeter on forest lands is 25 percent contained, but the fire in Mexico is burning west and could also cross the border west of Summit Motorway. Fire managers might expand the fire's perimeter westward toward Sycamore Canyon. The size of the fire includes acres torched in burnout operations used to secure the fire's perimeter.
Helicopters are dipping for water at Peña Blanca Lake. The lake is closed to the public as is the area between Sycamore Canyon and Walker Canyon south of Ruby Road.
