There is some steel produced around here still but it's nothing like the old days. The gigantic J&L plant was still in operation when we drove my brother to Carnegie Mellon.
As evidenced by the smell of sulphur yesterday morning the coke plants down in Clairton are still alive and well!
I had not realized that literally all modern communications were flowing through a single point of failure. It was a surreal experience.
Even multiple lines to the same DSLAM were considered expensive back in the day... so if you sliced a single line, you're SOL.
Unless as part of the misconfiguration that caused this, the firewall also thinks it knows how to route traffic to the affected prefixes, in which case it would be accepting the traffic and routing it, in which case segments of the internal LANs could be flooded too.
I imagine Verizon has some sort of webUI with bad defaults (no filter) so that their helpdesk can setup new customers - Hanlon's razor being what it is.