RAS:
Run a sprinkler line made of iron pipe on the peak line of your roof. Before leaving turn it on. It will keep your roof from burning and the water that runs down will keep your walls wet.
Depends on where you live and what kind of fire. We have a 40-acre horse ranch in SoCal. The big fires in 2003 swept right through our place. We have 3 water reservoirs - one 10,000, one 6,000 and one 2,000 gallon, all on hills so we can gravity feed. We also have a water truck with a 2,500 gallon tank, pumps on steroids and a firehose. That saved our bacon. But we're on a well. The fire burned the power lines, cutting off power to our well pump and booster pumps. When the reservoirs were empty, we had to run around with the tractor dumping dirt on the fire. We have an 8.5 KW welder generator that we could wire up to run the pumps, but the fire happened so fast we didn't have time. We got it running the 2nd day so we could water the horses.
The fire was generating its own wind - on the order of 70 mph gusts. It got hot enough to delaminate the steel walls in some of our barn stalls. And our place is always completely scraped clean of brush. Full grown adult trees were bursting into flames. Embers blew into the barn and caught the stall bedding on fire. A sprinkler on the roof would have been like peeing on the sun.
We have 80-90 horses on the ranch. We evacuated as many as we could, then turned the rest loose to run when they had to. In the end they were all OK, though 2 of them got smoke inhalation and one had some pretty serious burns on its hooves. 13 stalls of the 40-stall barn had to be rebuilt, and thank God for a good insurance company.
If it weren't for the horses, I'd say, "Pack your crap and get out." We were purely lucky. And stupid, looking back on it.
Kevin B.