Miles of "coastal wetlands," include ammo storage bunkers, gun emplacement bunkers etc.
There were submarine nets, across the entrance to Long Beach-Los Angeles Harbor.
Much of the greater Lost Angeles basin, was under night time blackout, lest the dirty Japs bomb there, too.
My folks and grandparents told of rations of gasoline, rubber, sugar etc.
There were military installations, aircraft builders from San Diego to Ventura.
(I guess a good bit more of the same in SF bay area.)