Firefighters in Oregon are racing to save the Doerner Fir - one of the world's tallest and oldest trees - from a fire that has been burning since Saturday.
The giant fir, more than 325ft (99m) tall and estimated to be over 450 years old, has already lost about 50ft to the blaze, which may jeopardise its standing in global height rankings, officials say.
With more hot and dry weather forecast along Oregon's Coast Range, firefighters are struggling to put the fire out.
Officials have discussed some unconventional ways to put out the blaze including building scaffolding to reach and suppress flames higher up the tree.
The cause of the blaze remains unknown, though lightning has been ruled out.
