Ross Fire began after vehicle blew a tire on Highway 180, Texas A&M Forest Service clarifies

The Ross Fire in Palo Pinto began after a vehicle blew a tire, the Texas A&M Forest Service said on Thursday.

The wildfire that sparked on Aug. 24 and has burned at least 90,400 acres in Palo Pinto and Jack counties "originated from equipment or vehicle use associated with a roadside start" after the tire blew on Highway 180. Investigators "could not conclusively identify the specific ignition source," the agency said.

On Wednesday, an official with the Forest Service said the blown tire itself sparked the fire, prompting the clarification.

The fire has destroyed at least 157 structures, 140 structures are damaged, and 453 structures have been saved. It is currently 38% contained. The National Weather Service said the Ross Fire is now the second-largest wildfire in North Texas. 

The fire began near Ross in Palo Pinto County and was initially estimated at 25 acres, according to the Palo Pinto County Emergency Service District. It rapidly expanded to thousands of acres and crews from across the state have joined in fighting the fire. 

Why is the wildfire risk high in North Texas?

Dry vegetation, a lack of measurable rainfall and gusty winds are creating elevated wildfire conditions across parts of North Texas.

The National Weather Service is monitoring several wildfires west of Interstate 35, with the Ross Fire among the largest.

After more than a month without measurable rainfall, fine surface fuels have become critically to extremely dry, making vegetation easier to ignite and allowing fires to spread quickly.

Residents are urged to avoid outdoor activities that could produce sparks or flames.