![The cause of the fire was under investigation.](https://patch.com/img/cdn20/users/23735283/20240729/081952/styles/patch_image/public/riverside-county-cal-fire-truck-california-patch-renee-schiavone___29201843714.jpg)
JURUPA VALLEY, CA — A brush fire that broke out Monday on a hillside just north of Jurupa Valley charred roughly 30 acres before it was stopped.
The non-injury "Sierra Fire" was reported at 3:20 p.m. along Sierra Avenue, near Armstrong Road, in an area known as Jurupa Hills, bordering the San Bernardino County line, according to Cal Fire/Riverside County Fire Department.
The agency said that multiple engine and hand crews from both Riverside and San Bernardino counties were sent to the location and encountered flames moving at a moderate rate in the hills northeast of the Oak Quarry Golf Club.
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Several Cal Fire water-dropping helicopters were able to make targeted drops in support of ground crews, according to reports from the scene.
At 4:20 p.m., the brusher's forward rate of spread was halted, and crews were establishing tentative containment lines.
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No homes or other structures were damaged.
The cause of the fire was under investigation.