Looting, auto-burglaries, package thieves, assaults, and mischief: things that can go wrong during a multi-day power outage or failure. Whether planned to prevent wildfires by the Utility, or unplanned by earthquake, darkness and melting ice cream could be the least of your problems. Civil unrest is also a possibility. Imagine it, to survive it without violence or drama.
If you don't think it can happen to you, or you want to know the odds, start here. There are links to the maps the Utility is using to determine which lines to shut off during fire season.