// Risk Intelligence
| Risk Score | 7 / 10 High |
| Facility Type | 🏟 Stadium / Mass Gathering Venue |
| Operator / Branch | Port of Seattle |
| Host County | King County WA |
| Nearest City | Washington DC |
| Primary Risk Radius | 10 miles |
| Secondary Risk Radius | 30 miles |
// Strategic Significance
Seattle-Tacoma International is the primary airport for the Pacific Northwest and a major transpacific gateway. It sits on a ridge between the Duwamish Valley and Puget Sound directly in the path of Mount Rainier lahar flows. The Cascadia Subduction Zone could trigger an earthquake closing the airport.
// Civilian Impact Assessment
50 million annual passengers. Mount Rainier lahar flows could reach the airport within hours of a major eruption. Cascadia earthquake could damage runways and infrastructure.
// Evacuation & Shelter Guidance
I-5, SR-518, SR-99. King County Emergency Management coordinates with Port of Seattle for seismic and volcanic emergency protocols.