I live across from a huge state forest, the previous owner installed an 1 1/4 pvc line from the well to the roof for a jerry rigged fire sprinkler system for forest fires, I cut the line to fill my pool, but could easily put it back in place, as long as I can run my well pump off the generator, if I had to leave , I could fill the gen with fuel, start the water flow and bug out
Not sure how the FD would feel about the gen full of fuel running in the middle of a forest fire, but the cascade of water off the roof and flooding my yard should be an equal consideration