Given how the 2020s have gone so far, I'm feeling some meaningful concern about the news that we might be getting rolling blackouts if European fuel supplies get too low. I'm not at all sure whether they're overplaying the risk to prepare people, or dramatically underplaying it as they did with the first COVID lockdowns.

I'd be interested to know what, if anything, people recommend as preparation? I don't want to go overkill on something that may not even happen, but it also seems reasonable to consider the issue before everyone starts panic buying supplies.

I'm in the middle of a city, which has definite advantages in terms of walking access to shops and public buildings, but everything I own (including gas boiler and gas stove) needs electricity to run. It seems like a 500Wh LiFePO battery might be a good middle ground in terms of keeping creature comforts up and running, but they aren't exactly cheap so I'd be interested in any opinions and recommendations there?

More broadly it'd be great to hear what people think about the general risks, good preparations to make, and useful supplies that are easy to overlook?