The issue is not the ferry system's ordinary operability. On most days, the system functions as designed. The vulnerability is conditional and becomes critical precisely when conditions are worst. A severe storm that makes bay crossings unsafe simultaneously removes the primary transit option for communities that have no freeway alternative. Oakland Airport presents the sharpest version of this problem: both ferry access and ground connections can be degraded by the same weather event. Emergency planners have identified the East Bay hills evacuation gap as a life-safety concern. The Nimitz Greenway provides documented urban heat island and air quality benefits to corridor communities, but it cannot substitute for evacuation infrastructure during wildfire events. This is a known and growing exposure.