A fire that erupted Monday on a hillside behind a water treatment plant in Temecula scorched about a half-acre before Cal Fire aircraft partially contained it.
The blaze was reported about 1:40 p.m. in the area of Avenida Alvarado and Diaz Road, just west of Interstate 15, according to the Riverside County Fire Department.
Multiple engine crews were sent to the scene, but crews were unable to gain immediate access because of a lack of paved roads, forcing them to hike to the location.
A Cal Fire water-dropping helicopter and air tanker made several drops, smothering part of the blaze amid light winds out of the west, according to reports from the scene. As of 2:20 p.m., crews were continuing to attempt to encircle the fire, which was not threatening any homes or other structures.
There was construction activity in the general vicinity, but it was unclear whether that sparked the fire.
The nearest building is a treatment plant managed by the Rancho California Water District.
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