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.
It estimates that about 1% of the population [of Phoenix], or 13,250 people, would die, and half the city, or 816,570 people, would be put in emergency rooms if power was completely out for two days, then slowly restored throughout the region over the next three.
https://cronkitenews.azpbs.org/2023/06/05/study-phoenix-face...
I know of multiple people in the TX hill country with thousands of gallons of buried propane on site and brand new generators waiting to be fired up for the very first time. If the weather is mild, most of these people could go two solid months before refueling.