Chronicle photographer Carlos Gonzalez reports from the Armstrong Redwoods State Natural Reserve near Guerneville, where CalFire was able to save heritage trees threatened by the Walbridge Fire, including the landmark Colonel Armstrong Redwood. Gonzalez describes a terrifying moment when some other trees fell, which he calls "unlike anything I've ever seen or experienced before." | Full wildfires coverage: sfchronicle.com/wildfires

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