// Risk Intelligence
| Risk Score | 7 / 10 High |
| Facility Type | 🏟 Stadium / Mass Gathering Venue |
| Operator / Branch | Port of Portland |
| Host County | Multnomah County OR |
| Nearest City | Washington DC |
| Primary Risk Radius | 10 miles |
| Secondary Risk Radius | 30 miles |
// Strategic Significance
Portland International sits on the Columbia River floodplain and faces multiple compound hazards including Cascadia Subduction Zone earthquake volcanic ash from Cascade volcanoes and Columbia River flooding. It is the primary airport for the Pacific Northwest interior.
// Civilian Impact Assessment
20 million annual passengers. Columbia River floodplain location creates flooding risk. Cascadia earthquake could damage runways. Volcanic ash from Mount Hood or Mount St. Helens could ground all aircraft.
// Evacuation & Shelter Guidance
I-205, I-84, Airport Way. Multnomah County Emergency Management coordinates Cascadia earthquake and volcanic emergency protocols.