Potential increase in deteriation?

So with the discovery of the large section of railings that collapsed within the last few years do we think we are getting ready to see more sudden signs of deteriation?

I.e. large cave-ins, large sections fall from the siding, major structures finally just crumbling to nothing.

Or do we think this is a one off and we're still a much longer way out from some major changes.

Also, if you do think large changes are going to be more common sooner, what do you guess (best hypothetical) is gonna be the next big one to happen?