“This surprises me. Everything there is built of concrete... You’d think it would be absolutely bullet-proof.”
Surely you gest! Most of PR is a ghetto with homes built to withstand nothing! Go there and see for yourself. I have, and outside San Juan, the place is a toilet.
I did live outside of San Juan, and most everything is built of concrete. But unfortunately the power grid is held together with baling wire and duct tape, it seems. As are the politics, which is I guess why it took so long to get everyone back on line.