In 2005, right after Katrina hit, a lot of people in the Gulf lost power for a long time. All cell towers were overloaded constantly. What kept working was radio.
A bog standard Sony radio would run for a long, long time on a few AA batteries. Back then, you could also pick up the audio portion of UHF and VHF analog TV too. It was the main lifeline for news and local updates.
Radio is a fantastic technology that is being wasted. Cheap to transmit, cheap to receive, and covers a wide area. It would be great to see a radio renaissance. Maybe the Zoomers reconnecting to older technologies will revive it.
It’s also great in wartime, when communications are likely to be interrupted. For an example read the book “All the light we cannot See” by Doerr