In the county where I live, there are large areas with no radio or cell reception. Law enforcement and emergency services must find someone's house and make a landline call to keep in touch with County Dispatch in those areas. Even the county seat has no radio reception and only has cell coverage because Homeland Security forced them to install a tower.
Our telco has installed fibre in the official communities and is slowly expanding, but when we lose power (which happens at least 2-3 times a year, sometimes more), we have no communications whatsoever. Once this year, our town's Maintenance Director had to drive out to another town in order to inform our telco that we had no service (Part of their network had gone down, and they hadn't realized we had gone down as well).
We just have to hope that we don't suffer an actual disaster, because we no longer have POTS as a a backup infrastructure.