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.
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Chancellor George Osborne will seek to reassure financial markets on Monday morning following Britain's decision to leave the EU.
In his first outing since the referendum result, the lead Leave campaigner has outlined his vision for a post-Brexit Britain.
Becoming fresher, unsettled with rain at times as the week goes on.