The most significant active fire in the western United States right now is burning in one of the country’s most iconic landscapes. The Dome Fire, ignited September 15 in Yosemite National Park, has grown to 4,606 acres and reached 30% containment as of the latest National Interagency Fire Center report, with over 800 personnel assigned to the incident.

Remote Terrain Complicates Firefighting

The Dome Fire is burning in steep, rugged wilderness terrain north of Wawona Dome in the southern portion of Yosemite National Park. The remote nature of the fire’s location has hampered direct attack efforts, requiring crews to rely on handline construction and helicopter support to build containment.

National Park Service incident commanders report that crews are actively widening handlines in the Empire Meadows and Horse Ridge areas. Wildland firefighters are also placing contingency lines off of Glacier Point Road as a precautionary measure, though no imminent threats to infrastructure have been reported.

The fire increased by approximately 194 acres in a single day this past week, indicating that while behavior has not been extreme, the fire continues to find fuel in the dense timber and mixed conifer stands of the southern Sierra Nevada.

Growth Trajectory

The Dome Fire’s growth has been steady but not explosive:

  • September 15: Fire ignites near Wawona Dome
  • September 18: Approximately 2,000 acres, containment minimal
  • September 23: 3,795 acres, 15% containment, 840 personnel
  • September 25–26: 4,498–4,606 acres, 28–30% containment

The Yosemite National Park is managing the incident under National Park Service authority. The fire is listed on InciWeb and is being tracked nationally given its location in one of America’s most visited national parks.

National Context

The Dome Fire is the largest of just three large fires currently listed on the NIFC national situation report, alongside the Narrows Fire in Oregon and the Stone Bridge Fire in Oklahoma. As of September 25, the national fire landscape shows 26 total large fires nationally, with 6,824 firefighters and support personnel assigned to incidents.

The nation’s overall National Preparedness Level has dropped to Level 2 on a 5-point scale — down from Level 5 in late August — indicating that the peak strain on national firefighting resources has passed for the 2026 season. However, the Dome Fire serves as a reminder that significant fires can still develop late in the season, particularly in California.

Year-to-Date National Statistics

The 2026 fire season has been historically severe nationally. Through September 25, the U.S. has recorded:

  • 57,087 fires (125% of the 10-year average)
  • 8.5 million acres burned (145% of the 10-year average)

The 2026 season is on pace to rank among the worst on record for total acreage burned, surpassing the 2021 season’s comparable totals.