In my location Comcast was up for about 6 hours after blackout.
For me, my power went out on Wednesday at 11:58 pm. I knew I was in an affected area per PG&E's maps and address lookup tool. Comcast internet access went out at 12:45 am.
I confirmed by visiting my cable modem's status page (
http://192.168.100.1/).
At that point, I just turned off power to the UPSes running my cable modem and wireless access point. I checked the Xfinity app and it listed an unplanned outage for me also affecting 2500+ customers. It was still like that when I left for work in the morning (no power and no Comrap).
Once the power went out, I went to work on unwinding and untangling extension cords and getting my 1000 watt pure sine wave inverter hooked up to my Bolt (had tested it before and it could start and run my fridge). I kept that going all night until I went to work and had to leave. I powered my fridge, laptop, some lights and my security camera NVR system. When I was awake, I had to tether my laptop to a cell phone to surf the net.
For the Bolt, the car must be left in ready mode otherwise the 12 volt will go flat. To workaround a stupid 1 hour timeout where the car shuts itself off if left in park for an hour, I had keep it neutral and exit from the passenger side. Basically, enter from passenger side. Use a rod or stick to push the brake pedal and shift to neutral. Exit from passenger side. That's easier the than doing it from the driver's side and having to climb over to exit from the passenger side.
My power came back around 3 pm on Thursday, which is much earlier than I expected. I expected to be w/o power until at least sometime Friday.
Fortunately, my work (w/free L2 charging) wasn't affected and areas just a few miles away from home also weren't affected. There are 2 paid DC FCs within 7 miles of home (if I needed to use them) and I'm pretty sure they weren't in affected areas.