It's pretty much a "countries with bad infrastructure" problem.

But it can happen anywhere, so you should be prepared anyway. Like I'm living in a city and had a surprise 5 day power outage this winter. And it's not a place with bad infrastructure I can't remember any noticeable power outage in the last 8+ years. But unusual shit happened and power was gone for days.

Luckily it wasn't too cold. But at the last night before power was returned it was 10C in my room. Not too bad if you are prepared, very much bad if you are not (as it was the last day I was kinda half prepared, that night did suck).