“I don’t know who they think is gonna fill them.”
I suspect the “who” will be the dead filling the bags.
(OK the survivors will put the dead in)
Do a search for Oregon Tsunami Map. The state has some pretty good maps to show the extent of the tsunami
If I know local gubment, all the bags are stored in the new fire department and city hall. They will not be available, should a locally sourced tsunami hit Coos Bay.