The Rim Fire has threatened two groves of giant sequoias that are unique in the region, prompting park employees to clear brush and set sprinklers around the huge trees.
While sequoias have a chemical in their bark to help them resist fire, they can be damaged when flames move through slowly.
More top news
The world's top scientists have called for a ban on autonomous weapons and "killer robots" that can attack targets without human control.
Growth figures published today are set to show the economy bouncing back after a weak start to the year.
A stagnating jobs market has created a blockage in the career progression and earning potential for many younger works, a new report says.