The Windy fire, in the Giant Sequoia National Monument area of Sequoia National Forest and the Tule River Indian Reservation, has scorched more than 39 square miles and is only 4% contained.
The fire has burned through the Peyrone and Red Hill groves, as well as a portion of the Long Meadow Grove along the Trail of 100 Giants.
A portion of one giant sequoia along the trail was confirmed to have burned, said Thanh Nguyen, a spokesman for the fire command.
Fire crews with hoses and water-dropping helicopters were working to limit damage to the giant sequoias in the groves, where there are also other types of trees.
Sequoias have adapted to fire and can benefit if the flames are low-intensity.
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