How would you prepare for a blackout? Power blackout or information blackout? For power: inverters, batteries, solar, propane generators. For information: ph

How would you prepare for a blackout? Power blackout or information blackout? For power: inverters, batteries, solar, propane generators. For information: phone modems to get around BGP route injections though truth be told I would just treat that as a vacation from the internet, HF/VHF/UHF radios for local chatter is all I would really care about.