hikermor and I are in agreement, but I need to toss in bridges. Being stuck with no way back after a major earthquake is the reason my truck is always prepared for an overnight or four.

As for wildfires, where I'm located they are either small and easily contained, or they start well to the east and are blown by Santa Ana winds, and may take a week to become a direct threat. With plenty of warning I pack the truck for evacuation and then wait and wait and wait...

As for how far, in the case of an earthquake I hope to have enough water to hold out until utilities are restored -- not going anywhere. Then again, if it's really big (8.0+) utilities could take a while. In this case I could find myself leaving SOCAL and visiting friends/family in PNW.

For wildfires you just need to get out of the path if you need to get out at all. In this case my first stop would be get a room nearby work. If my house becomes a casualty, I'm visiting friends/family in the PNW. I've never had to evacuate.