Just great— I’m flying at to Tacoma at the end of the month. Now I’ll have something else to worry about. :)
I hope you're joking. Unless you're engaged in a summit climb, or chained to the bottom of one of Rainier's lahar outflow channels, you have nothing much to worry about if you happen to be in the Puget Sound area during a typical once-in-a-thousand year Rainier eruption. Nothing like Mt. St. Helen's catastrophic 1980 eruption, which lead to a couple of weeks of work for me shoveling ash.