Yosemite wildfire threatens iconic giant sequoia grove
YOSEMITE NATIONAL PARK, Calif. — The largest grove of giant sequoias in Yosemite National Park remained closed Saturday as firefighters battled a blaze that threatened the gathering of the iconic trees and forced hundreds of campers to evacuate.
The rest of the park in California remained open, though smoke that hung in the air obscured some of the most scenic vistas and views.
More than 500 mature sequoias were threatened in the Mariposa Grove, but as of Saturday afternoon there were no reports of severe damage to any named trees, including the 3,000-yearold Grizzly Giant. Some of the massive trunks were wrapped in fire-resistant foil for protection as the blaze burned out of control.
The cause of the fire was under investigation.
Beyond the trees, the small community of Wawona, which is surrounded by the park and a campground, was under threat, with people ordered to leave their homes and campsites on Friday night.
The fire was proving difficult to contain, with firefighters throwing “every tactic imaginable” at it, said Nancy Phillipe, a Yosemite fire information spokesperson. That included air drops of fire retardant as well as the planned use of bulldozers to create fire lines, a tactic that’s rarely used in a wilderness setting like Yosemite, Phillipe said.
Though firefighters were facing hot and dry conditions, they didn’t have to contend with intense winds on Saturday, said Jeffrey Barlow, senior meteorologist with the National Weather Service in Hanford. Given the relatively small size of the fire and minimal winds, smoke impacts were not expected to stretch far beyond the park, he said.
The giant sequoias, native in only about 70 groves spread along the western slope of California’s Sierra Nevada range, were once considered impervious to flames but have become increasingly vulnerable as wildfires, fueled by a buildup of undergrowth from a century of fire suppression and drought exacerbated by climate change, have become more intense and destructive.
Lightning-sparked wildfires over the past two years have killed up to 20% of the estimated 75,000 large sequoias.
There was no obvious natural spark for the fire that broke out Thursday next to the park’s Washburn Trail, Phillipe said. Smoke was reported by visitors walking in the grove that reopened in 2018 after a $40 million renovation that took three years.
The grove, which is inside the park’s southern entrance, was evacuated and no one was injured.
The fire had grown to about 1.1 square miles by Saturday morning.
A fierce windstorm ripped through the grove 18 months ago and toppled 15 giant sequoias, along with other trees.
The downed trees, along with massive numbers of pines killed by bark beetles, provided ample fuel for the flames.
The park has used prescribed burns to clear brush around the sequoias, which helps protect them if flames spread farther into the grove.