The Arrow Creek Fire broke out in Sequoia and Kings Canyon National Parks on Aug. 22, drawing an immediate wildland firefighting response to protect some of the oldest and largest living trees on Earth.
The fire is part of a broader pattern of intense wildfire activity across California’s Sierra Nevada during the 2026 fire season. Giant Sequoias, which exist naturally only in a narrow band of the Sierra Nevada, are uniquely vulnerable to high-intensity fire and cannot be replaced on any human timescale, according to the National Park Service.
Park visitor access and road closures were under active management as of Aug. 23. Federal wildland firefighting resources are simultaneously stretched across fires in Alaska, Montana, Oregon and Nevada, straining the national firefighting workforce.
Giant Sequoias can live more than 3,000 years and evolved with low-intensity fire as a natural part of their ecosystem. However, decades of fire suppression have allowed dense understory vegetation to accumulate in sequoia groves, creating conditions that can produce fire intensities the trees cannot survive.
Recent fire seasons have destroyed thousands of Giant Sequoias. The 2020 Castle Fire and 2021 KNP Complex Fire together killed an estimated 13 to 19 percent of the world’s Giant Sequoia population, according to National Park Service assessments.
The National Park Service and U.S. Forest Service have been conducting prescribed burn and mechanical thinning operations in sequoia groves to reduce fuel loads, but the pace of treatment has not kept up with the accelerating fire threat.
The Arrow Creek Fire’s size, containment status and proximity to major sequoia groves were being assessed by fire management teams as of Monday.
Sequoia and Kings Canyon National Parks host approximately 1.9 million visitors annually.