Snohomish County north of Seattle was the site of the catastrophic Oso landslide on March 22 2014, which killed 43 people and destroyed a neighborhood — the deadliest landslide in US history. The county's steep forested hillsides saturated by heavy rainfall create persistent landslide risk. Cascadia Subduction Zone earthquake exposure and Mount Baker volcanic risk add additional serious threats.
// Recommended Supplies
Essential gear for power outages, severe weather, and emergency situations in your area.
- Emergency Food Supplies
- Water Filtration & Storage
- Backup Generator
- Solar Backup Power
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// Risk Intelligence
| Threat Score | 8 / 10 High Risk |
| Primary Hazard | Earthquake / Landslide |
| Secondary Hazard | Flooding |
| FEMA Flood Zone | Zone X (Seismic High Risk) |
| Federally Declared Disasters | 44 |
| Last Major Event | Oso Mudslide (2014) |
| Event Frequency | Major event every 4–5 years |
// Emergency Operations
| Emergency Mgmt Phone | (425) 388-3838 |
| Emergency Shelters | 32 designated facilities |
| Evacuation Routes | I-5 North, US-2 East, SR-9 North, SR-99 North |
// County Profile
| County | Snohomish County WA |
| State | Washington (WA) |
| Population | 827,957 |
| Area | 2196 sq miles |
| FEMA Region | Zone X (Seismic High Risk) |
// Major Cities
// Cities in This County
// Other Washington Counties
// Nearby Infrastructure Risks
Critical infrastructure facilities within or near this area that could affect civilian safety during emergencies, conflict, or infrastructure failures.
Infrastructure risk data is for emergency preparedness awareness. Facility locations are publicly known. Always follow official emergency guidance.