LOS ANGELES, Sept 21, 2021 (BSS/AFP) - Hundreds of firefighters were

battling to protect several groves of giant sequoias in the United States on
Monday, warning the enormous ancient trees were at risk from out-of-control
blazes.

  A number of separate fires were converging on the California woodland that
is home to the huge trees, highlighting the terrifying power of wildfires to
consume everything in their path.

  Incident commanders said the Windy Fire, which has already charred 25,000
acres (10,000 hectares) has burned into the remote Peyrone Sequoia Grove and
the Red Hill Grove.

  "We don't know that those are destroyed," Windy fire incident spokeswoman
Amanda Munsey said, according to the Los Angeles Times. "But the fire has
completely surrounded those two groves."

  In nearby Long Meadow Grove, the blaze had spread to the vulnerable top of
at least one of the trees.

  "It was running toward multiple trees and (firefighters) were able to get
it out, but it did get into the crown of one of the sequoias."

  Wildfires that spread to the tops of trees -- especially very tall trees --
can move quickly through the forest, as the tops of the trees explode,
showering embers over a large area below them.

  Further north, the KNP Complex fire continued to threaten the renowned
Giant Forest, home to General Sherman, the world's biggest tree by volume,
and standing at 275 feet (83 meters).

  General Sherman, which is estimated by the National Parks Service to be
2,200 years old, was wrapped in fireproof foil blankets last week.

  Incident commanders said they believed they could protect the tree from the
24,000-acre blaze, which was sparked by lightning just over a week ago

  They point to meticulous forest management over the last few decades,
including prescribed burns that deplete available fuels, and slow the
progress of fires.

  California and other parts of the western United States are laboring under
a years-long drought that has left swathes of the region's magnificent
forests tinder dry.

  Scientists say human activity, including the unchecked burning of fossil
fuels, is warming the planet and changing weather patterns, making wildfires
hotter, more intense and more destructive. The giant sequoias are the world's
largest trees by volume. Their relatives, the California redwoods, can grow
taller -- well over 100 meters -- but are not as wide.

  Both kinds of tree are adapted to fires, with thick bark that protects them
from heat.

  In their lifetimes, which are measured in thousands of years, they
typically endure lots of fires, the heat from which helps their cones to
open, allowing the seeds to disperse.

  But longer, hotter and more aggressive fires can damage them, sometimes
irreparably, and California has recently seen multiple severe fire seasons in
a row.

  One fire last year killed up to 10,000 of the trees.

  Rising temperatures and increased dryness due to changing rainfall patterns
thanks to climate change create the ideal conditions for forest fires. The
World Meteorological Organization said that the five-year period to 2019 was
"unprecedented" for fires, especially in Europe and North America.