We've discussed this before in another thread. There are some things I would do and some things that I have done to prevent losing the house to fire. We are in a wooded area so it is a concern.
A while back we decided to put on a metal roof. It was partly so we wouldn't ever have to worry about the roof since our other one was fine (and the metal roof went right over it), but it also provided visual improvement and protection against really nasty weather and FIRE. We even got a discount from our homeowners insurance. It's not a fire protection guarantee, but it would help.
I always keep a hose near outdoor and indoor garage faucets! In the winter they are hanging on an inside wall. Metal type of hoses are best for this purpose. I usually keep two 50' hoses that can connect with a good nozzle hanging on a wall.
If a small fire ever starts in a garage or someplace outdoors, someone could have easy access to water and can aim water either at the fire, or wet down the area (or home) to prevent a fire from taking hold. Always have extra hoses available for that cheap insuance. You don't want to run around wondering where someone put the garden hose if a fire happens. If a non-family member doesn't know where you put your hose, they won't be able to assist in putting out a fire.
We try to keep the dry brush and underwood cleared visually from the house. Not only does it provide a nicer appearance, it eliminates some of the fuel a fire would need. I have my own chainsaws....both battery operated (with lots of backup milwaukee batteries) and gas powered Stihls. My back doesn't allow me to do as much as I used to, but I do what I can.
I have the camper ready to roll even in the winter with some clothes and other essential packed in there. I'd have to grab some food and other stuff, but it would be ready to roll since I wouldn't want to get too far from home without a place to stay if we HAD to evacuate. The propane tanks are kept filled at the end of the season. Plus, it would give us more room to throw valuables into if we had to go. Hopefully we would get some notice before we'd have to leave, giving us a chance to load up. If not, we'd still have a place to stay if we had to roll out ASAP.