First thing to consider when deciding to stay and fight or leave is how well prepared your house is.

If you have cut the brush and trees back so you have a large space between the house free of any vegetation likely to support a fire (recommendation vary so check with your local FD, but 75' to 120' comes up a lot) and your roof is highly fire resistant, tile or metal, and you have fire resistant shutters over the windows, and you have a plentiful supply of water, and have invested in a proper equipment then you have a shot.

If not, then your best bet is to have good fire insurance and to evacuate when they tell you and take you important papers and small heirloom items with you as you go.

Staying and fighting isn't for everyone. Unless the property has been prepared well ahead of time, most local FDs have advice for what needs to be cut and how far back, your wasting your time. If your serious they can also advise you as to what can be safely planted nearer the house. There are pants that don't burn well so you needn't live in a dead zone.

Be aware that standing off a fire is tough, dirty, tiring and nasty work that, if things go bad, can get you killed. You have to be prepared to spend up to 72 hours on alert breathing smoke and near exhaustion. You need to be in at least moderate shape, strong enough to haul gear and climb ladders, and essentially free of lung or heart problems.

If your preparing to stay these people will sell you some equipment that might work:
http://www.homefirefightingsystems.com/home.html

There are other, possibly better and cheaper, organizations that can sell you what you need but this site will give you some idea as to what is available and has some good advice on it.