Let's try to keep this thread on topic gentlemen....

Back in the early 2000's the Structural Engineer's Association of Washington (SEAW) worked in collaboration with other organizations to come up with this publication--

M6.7 EQ Scenarios

In it, IIRC, the worst case scenario was that pretty much everything west of I-5 would be a total loss due to the Cascadia fault quake(s) itself and resultant tsunami as evidenced by the far-inland sand lenses bearing remnants of saltwater creatures.

The SEAW website is a good source for actual post-event reports and "preparedness" resources (as if one could ever be prepared for such a thing) here.

Look at the reports on SEAW's website and extrapolate the photographed damage to your own city or neighborhood. At a minimum, one should have a few days supplies of food and water. If structures are unsafe to occupy (seen it post-Nisqually and definitely post-Northridge as I was at ground zero and the surrounding places assessing damage while y'all were watching on the news), having access to your tent, stove/grill and other camping essentials (mountain money) may make those trying days easier for you and yours to endure. Also, know where/how to promptly turn off all utilities to your home to avoid fire/water damage. Think zero electricity, food, potable water from a tap, phones, etc.. Make a plan and communicate it to your family members. It is very cheap insurance should such an event ever become reality....