Colorado's seventh-largest wildfire — which scorched more than 102,000 acres — ignited after a tree fell on power lines, according to state investigators.

Federal officials are enlisting arborists and other tree experts as they scramble to develop a plan to protect one of the world’s tallest non-redwood trees from losing a significant chunk of its ...

(CUSTER COUNTY, Colo.) — A report by the Colorado Division of Fire Prevention and Control declared the Aspen Acres Fire ...

Portland, Ore. — Authorities in Oregon are trying to extinguish a fire burning in one of the world's tallest trees, near the state's southern coast. The Doerner Fir, a coastal Douglas Fir tree over ...

Add Yahoo as a preferred source to see more of our stories on Google. In coastal Oregon, the state's tallest fir tree is burning. Douglas-firs (Pseudotsuga menziesii) are Oregon's most common trees, ...

Across the western U.S., wildfires are becoming larger and more severe—and even trees that initially survive are dying in subsequent years, making it harder for forests to regenerate, according to new ...