Thank you, Chaos, for your effort. I couldn't find it myself either. I've shared all the keywords I recall, EMP.

NightHiker contributed some good stuff to this forum. Too bad he's not here anymore. I seem to recall that the post I'm talking about links to an external webpage on risk assessment. I'll keep looking.

Hikermor -- yes, I'm steering my friend away from the sensational stuff and toward more likely scenarios. I also urged her to take the Red Cross courses on first aid and CPR.

I got some SAR & medical training because for a while in my life I lived near a university with a pretty happening outdoors program. So I was lucky. But many people don't have that option. It seems to me that such courses should be widely available for the good of the public.