Wind Shift Aids Containment Efforts as South Mountain Fire Grows to 1,863 Acres

TOOELE COUNTY, Utah — The South Mountain Fire, burning west of Stockton in Tooele County, had consumed 1,863 acres as of late Tuesday afternoon, with firefighting crews gaining assistance from a favorable shift in wind patterns.

According to Utah Fire Info, crews have actively engaged the blaze and were aided Tuesday when winds shifted direction, blowing the fire back onto itself and slowing its forward progress. The fire was first reported just before 9 p.m. Monday and was initially estimated at 200 acres. Fire crews from multiple local, state, and federal agencies responded immediately.

Fire officials reported the fire was moving downhill to the north, with flames measuring between 8 and 12 feet in length. The North Tooele Fire District noted that wind gusts reaching 50 mph, combined with dry conditions, contributed to the fire’s rapid overnight growth.

While the exact cause remains under investigation, a representative from the Utah Division of Forestry, Fire and State Lands indicated the fire started near the crest of the mountain and was human-caused. Investigators continue to determine the specific ignition source. Overnight winds of 55 mph pushed the fire down the east side of the ridge, shifting the primary containment efforts to the western side Tuesday.

Protecting critical infrastructure remains a top priority. “We are prioritizing trying to protect the infrastructure on the top, the communication towers,” a fire official stated, noting the use of air tanker drops and helicopter resources to defend these assets. Assessment of any potential damage to the infrastructure is ongoing.

Currently, no evacuations are in effect. Officials confirmed a fire break is in place to help protect the town of Stockton on the South Rim.

As a precautionary safety measure during active wildfire conditions, Rocky Mountain Power may temporarily shut off power to surrounding areas. Power was de-energized late Monday for residents in South Rim Rush Valley and was restored earlier Tuesday. Tara Lights, a spokesperson for Rocky Mountain Power, explained the protocol: “We have an active wildfire. We’ll actually de-energize the power lines around that wildfire for the safety of our first responders. So we don’t contribute to an existing fire. And so we don’t start any additional fires.”

Lights added that arcing power lines damaged by fire can pose significant hazards. Crews must thoroughly inspect affected areas and assess damage before repairs can be made and service restored.

Since the beginning of the year, Utah has recorded 233 wildfires. Of these, 198 were determined to be human-caused, 18 were sparked naturally by lightning, and the cause of 17 remains under investigation.