Glen Canyon Fire Risk: Eucalyptus Trees Spark Concern

San Francisco's Glen Canyon faces potential wildfire risks, according to a recent Civil Grand Jury report. The canyon's numerous Blue Gum eucalyptus trees, an invasive species, are identified as a significant fire hazard due to their oily, flammable foliage. These trees, planted after a failed 19th-century timber venture, are now a concern for fire safety officials.

The report recommends managing vegetation through brush clearing and removal of diseased trees, rather than large-scale eucalyptus removal, which is impractical on the canyon's steep terrain and could increase landslide risk. Public Works officials will coordinate with CAL FIRE on these efforts.

While San Francisco's climate is typically considered low-risk for wildfires, the report cites the 2025 Pacific Palisades fire as a cautionary tale for urban areas with inadequate vegetation management. The city's Emergency Firefighting Water System provides additional resources beyond the two existing fire hydrants.

The San Francisco Public Utilities Commission has already begun removing trees and planting fire-resistant native species like coast live oaks. The Recreation and Parks Department, which manages the majority of the canyon, agrees that inter-agency coordination is crucial for fire safety.