I guess the meaning of evacuation is somewhat hazy. According to one source, many people left San Francisco in 1906 and traveled all the way.....to Berkeley and Oakland. I think the scenario envisioned by those in central Oregon is just a trifle unrealistic - a sort of atavistic dread of "them furriners on t'other side of the mountain."

After all, we are a fairly well developed country with the ability to respond decently to disasters (Katrina notwithstanding - the record in California and elsewhere is reasonable).

Besides, I and others are CERT trained - we can leap tall buildings at a single bound - provided they have collapsed first....