Anecdotal, but my spouse was in surgery during the outage and it went fine, so I imagine they take precautions (like probably having a test machine for updates before they install anything on the real one, maybe)

It did impact emergency services

Good News! Unless something has changed since I worked in healthcare IT, those systems are far too old to be impacted!

I'm half-joking. I don't know what that kind of equipment runs, but I would guess something embedded. The nuke-med stuff was mostly linux and various lab analyzers were also something embedded though they interface with all sorts of things (which can very well be windows). Pharmaceutical dispensers ran various linux-like OS's (though I couldn't even tell you the names anymore). Some medical records stuff was also proprietary, but Windows was replacing most of it near the end of my time.

One place we had ran their keycard system all on a windows 3.1 box still. I don't doubt some modern systems also are running on Windows which has interesting implications for getting into/out of places.

That said, a lot of that stuff doesn't touch the outside internet at all unless someone has done something horribly wrong. Medical records systems often do, though (including for billing and insurance stuff).

I was just watching this show called Connections and the first episode was about a power blackout and it showed how the lights went out during a birth.

Great show it went on about what do you do if the power stays off permanently and how we aren't well prepared for that and how to start a civilization after you kill some farmers and steal their land but non of their tools work without power either and if you know how to mount an old-school plow to oxen