well ... if that was me in Coos Bay i would have a plan to get to high ground FAST. You will definitely feel the magnitude 8-9 earthquake before the tsunami hits. the important thing is that your whole family needs to know exactly where they are going, and they must react straight away. now is a really good time to work out those details.
when the Japanese tsunami hit there was a very interesting story about an old woman who fled the tsunami on a bicycle. I know you are thinking this sounds ridiculous - but she actually did it. of course, an old woman cannot ride faster than a tidal wave. BUT what she did - was to get going immediately when she felt the quake. so she had some lead time, and it was just enough to get her to safe ground.
having a plan, and executing it when you really need to, can be a lifesaver :-)
A good lesson for all of us.
Pete2