Natural Disaster Risk in Mossyrock

Natural Hazard Profile: Mossyrock, Washington

Mossyrock, in Lewis County, is a town of roughly 3,382 residents situated in the Pacific Northwest. Its oceanic climate brings mild, rainy winters west of the Cascades and semi-arid conditions to the east, and in particular a critical wildfire period in eastern Washington each summer. These conditions collectively define the natural hazard environment that Mossyrock residents and property owners must navigate.

Mossyrock's overall natural disaster risk is rated 5.5/10 (Moderate) by FEMA's National Risk Index. The threat from nearby active volcanoes tops the local risk profile, with potential hazards including ash fall that disrupts air travel and agriculture, and lava that threatens infrastructure. Secondary hazards include avalanche and earthquake.

Within Washington, Mossyrock's risk is, near the 5.8/10 state average. Nationally, it ranks above the U.S. national average of 4.5/10. FEMA's analysis of Lewis County identifies volcano as the foremost hazard, followed by avalanche and earthquake. These rankings reflect the relative frequency and severity of each hazard type in the local environment.

With a moderate risk rating, Mossyrock 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.