Astoria sits at the mouth of the Columbia River on the Pacific Coast directly in the Cascadia Subduction Zone tsunami inundation zone. A full Cascadia rupture — a magnitude 8-9+ earthquake that Pacific Northwest scientists consider overdue — would generate a tsunami reaching Astoria within 15-20 minutes with wave heights potentially exceeding 30 feet. Much of the city's historic downtown and waterfront sits at near sea level. There is no realistic evacuation for low-lying areas given the warning time.
// Preparedness Recommendations
- Evacuation routes inland should be identified in advance.
- Store at least 72 hours of food and water.
- Elevate critical belongings above flood level.
- Have backup power ready in case of grid failure.
// 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 | 9 / 10 Critical |
| Primary Hazard | Tsunami / Cascadia Earthquake / Flooding |
| FEMA Flood Zone | Moderate |
| County FEMA Declarations | 8 |
| Last Major Event | 2020 Wildfire |
// Emergency Information
| Emergency Phone | 503-325-5821 |
| Evacuation Routes | State and US highways |
| Elevation | 69 ft above sea level |
// County Risk Profile
Clatsop County OR
Oregon · Earthquake / Tsunami
View full county emergency preparedness profile →
7/10
Moderate Risk