Natural Disaster Risk in Mammoth Lakes

Natural Hazard Profile: Mammoth Lakes, California

Mammoth Lakes, in Mono County, is a town of roughly 9,000 residents situated in the western mountain region near the Pacific Coast. Its Mediterranean climate brings dry summers and mild, wet winters with pronounced drought cycles, and in particular a critical fire season from late summer through fall. These conditions collectively define the natural hazard environment that Mammoth Lakes residents and property owners must navigate.

According to FEMA's National Risk Index, Mammoth Lakes carries an overall risk score of 5.3/10, placing it in the moderate category. Volcanic activity is the foremost natural hazard, with the area situated near active volcanic systems capable of producing lava flows, ashfall, and pyroclastic hazards. The area also faces notable exposure to avalanche and wildfire.

Within California, Mammoth Lakes's risk is, slightly below the 5.9/10 state average. Nationally, it ranks above the U.S. national average of 4.5/10. FEMA's analysis of Mono County identifies volcano as the foremost hazard, followed by avalanche and wildfire. These rankings reflect the relative frequency and severity of each hazard type in the local environment.

With a moderate risk rating, Mammoth Lakes residents are well-served by maintaining standard preparedness practices — an emergency supply kit, awareness of local hazard seasonality, and insurance that covers the top local risks. Periodic review of coverage for volcano is recommended.