This article is in Finnish (try your favourite online translator to read it), but that makes it even more worthwhile sharing here:
In Finland, it turns out, there is a movement of volunteers (“Kyläradio”, i.e. “village radio”) who establish a radio network to be used in disaster or blackout situations. The frequencies used are not available in Germany, but the idea is fascinating: a grassroots movement that ensures communication between remote villages (in Lapland and elsewhere) even when the rather vulnerable mobile phone networks would no longer work. All with minimal bureaucracy and run by enthusiasts.