Natural Disaster Risk in Atherton

Natural Hazard Profile: Atherton, California

Atherton is a town of roughly 7,002 residents in San Mateo County, in the western mountain region near the Pacific Coast. The area experiences dry summers and mild, wet winters with pronounced drought cycles, with a critical fire season from late summer through fall shaping the pattern of natural hazards that residents encounter. Understanding the local risk profile is essential for anyone living in, moving to, or owning property in Atherton.

According to FEMA's National Risk Index, Atherton carries an overall risk score of 5.9/10, placing it in the moderate category. Earthquake risk stands out in the local hazard profile, driven by proximity to fault systems with a history of significant ground movement. The area also faces notable exposure to landslide and coastal flood.

Atherton's risk score, near the 5.9/10 state average and above the U.S. national average of 4.5/10. Of the 18 hazard categories tracked by FEMA for San Mateo County, the highest-scoring are earthquake, landslide, and coastal flood. These scores reflect county-level data and represent the baseline risk that all communities in the county share.

Atherton's moderate risk profile means that while catastrophic events are less frequent, they do occur. Standard homeowners insurance typically covers many common hazards here, but confirming that earthquake exposure is adequately protected is a worthwhile step for property owners.