A firefighter watches the progress of the flames along the Western Divide Highway during last year's SQF Complex fire.
Image is from Sept. 14, 2020, near Camp Nelson, California.
(Photo: David McNew / Getty Images)
(CNN) -
A pair of wildfires burning in California's parched Sierra Nevada mountains forced the closure of much of Sequoia National Park, including its most treasured areas, where some of the largest trees on the planet are found. .
Although firefighters are "aggressively targeting" the fires to help douse them, the flames can affect the park's infrastructure and resources, according to the national park's website.
Giant sequoia trees, which can reach 90 meters in height, have already been affected by fires in the state in recent years: "Two-thirds of the entire area of giant sequoias in the Sierra Nevada have been burned in forest fires between 2015 and 2020, "said the National Park Service.
The redwoods that died in the Castillo fire last year could have been hundreds to 3,000 years old, the service added.
The flames of the Dixie fire destroy more than 370,000 hectares of forest in California
In this Sunday, Sept. 12 photo, released by the KNP Complex Fire Incident Command, plumes of smoke rise from the Paradise fire in Sequoia National Park, California.
(Photo: KNP Complex Fire Incident Command / AP)
Threats to Sequoia National Park: Colony and Paradise Fires
The park is threatened by the KNP Complex fire, which started by lightning last week and includes the Colony and Paradise fires.
According to the National Forest Fire Coordination Group, it has burned nearly 6,000 acres (about 2,500 hectares) within the park.
No information is available on the containment of the fire.
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The Paradise fire spiraled out of control Monday night, traversing the Generals Highway and the middle fork of the Kaweah River, causing the evacuation of park employees.
All Sequoia National Park facilities and services, including
park
campsites
, visitor centers and shops, are closed until the threat of the fire subsides, according to the park administration.
"Due to forest fire activity in the area, we are closing all entry points to the Secouyas National Park to backpackers and day trippers. All permit reservation holders will receive a full refund." , add an alert on the park's website.
"As of September 12, backpackers will not be able to obtain permits to stay overnight in wilderness areas that start from the Mineral King Valley, the Lodgepole or Giant Forest area, or from Ash Mountain (the foothills)."
Other areas of the natural park are open, he said, but are "heavily affected" by smoke and dangerous air quality.
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Destruction of redwoods by fire last year
Redwoods only grow naturally on the western slopes of the southern Sierra Nevada mountain range.
Between 7,500 and 10,600 mature giant sequoias were destroyed by last year's fire, according to a report from the National Park Service.
That amounts to 10-14% of the entire world population of mature redwoods.
Although trees depend on fire to open their cones and release seeds to reproduce, those fires historically burned naturally at lower temperatures, killing small trees and thinning the forest.
But fire suppression efforts have allowed the forest to become denser, which, combined with a years-long drought, has allowed many of those trees to die.
That has created more fuels that burn brighter and hotter than previous fires.
"The unprecedented number of giant redwoods lost to fire last year is a call to action," Clay Jordan, the superintendent of Sequoia and Kings Canyon National Parks, said in a statement in July.
"We know that climate change is increasing the duration and severity of our fire seasons due to rising temperatures and drought. To combat these new threats to our forests, we must unite all organisms. Actions that are good to protect our forests are also good for protecting our communities. "
trees fires