I'm totally unprepared to evacuate. I honestly don't know what I would grab, or where I would go. Tornadoes are my biggest threat. For that, I'm planning to build a storm shelter to hide in and then deal with the damage after the fact. Worse case scenario for that is buying a tent and camping out until I rebuild.
Fire is the second threat. We can have dry summers where fires become a threat. A massive forrest fire seems unlikely, but you just never know. I can see that creating a situation that we would have to leave our home and wait it out. Having read about the horses dying in Southern CA fires, I'm leaning towards opening up all the gates and giving them at least a chance of getting away. If I was to get really serious, I should start by taking pictures of everything for insurance. At least I would have some evidence of what we have if it's destroyed.
I have a backup drive on my computer, I'll take that, couple changes of clothes, and some pictures. Our dogs would go with us, and that's probably where most of the effort would be focused on. Food and water to a small degree, but not what I'm too worried about. I think we'll find that somewhere.