There was a multi-state blackout in 2003 that lasted up to 4 days in some areas. It was pretty bad. The gas pumps, requiring electricity, didn’t work. People quickly ran out of gas and left their cars abandoned at the station, waiting for power to be restored.

I had about half a tank and remember just heading west, hoping I hit an area with power before I ran out of gas… thankfully I did.

https://en.wikipedia.org/wiki/Northeast_blackout_of_2003