If I'm home bugging out is a last resort and walking is not an option -- you'll just die thirsty. A wildfire is about the only thing that would make me leave and in that case I'm taking the truck and it will have been packed for the evac.

Bugging out from SD there are limited options if traveling by foot in a mass evacuation. The vast LA metro area to the north; the desert to the east (some would consider the entire SW a desert), Mexico to the south and the Pacific to our west. I'm traveling by truck or not at all. Fuel had best be a reliable commodity, but during a mass evacuation that may very well not be the case.

My GHB is for walking home if I'm at work and a large shaker happens that makes roads impassable for vehicular traffic.