Well, I was six at the time. I was four when the Berlin Wall came down, and was vaguely aware something BIG was happening.
My parents never had a "plan" for how to deal with it going hot (IE, telling my younger sister and I) outside of hoping that either whatever hit Portland was too small... or big enough. My father was fond of saying he would realize he could die at any minute, then he'd go back to whatever he was doing. Mom refused to consider the idea because she didn't think it would happen, and that was that for her.
That is a crazy good memory you have. I can't recall being 4 in any serious way.