A wildfire known as the Dome Fire in Yosemite National Park grew rapidly on Wednesday, expanding from about 300 acres in the morning to more than 1,000 acres by afternoon and reaching 1,177 acres with zero percent containment by Thursday morning.

The fire was first reported at 8:28 a.m. on Tuesday, September 15, north of Wawona Dome in a remote backcountry area of the park. It is burning within a quarter-mile of Chilnualna Falls and has prompted closures of the Chilnualna Falls Trail and connecting trails toward Buena Vista and Crescent Lakes.

Fire officials reported moderate spread to the north and northeast, fueled by terrain and winds. Crews secured some lines on the south and west sides using natural barriers, but the steep, rugged wilderness terrain has limited access. No roadway closures have been announced, and the park reported minimal impacts to developed areas so far.

A California Interagency Incident Management Team is scheduled to assume command later on Thursday. Ground and air resources, including fixed-wing aircraft dropping retardant, are supporting operations. Smoke has been visible from Highway 41.

The cause of the fire remains under investigation. Officials have warned visitors of hazards including falling branches, burning logs, and reduced visibility from smoke. The park remains open, though affected trails are closed through at least September 23 unless extended.

This marks continued growth in an area that last saw significant fire activity nearly a decade ago during the 2017 Empire Fire.