In southern California, we are advised to keep excess brush trimmed away from our houses and property lines, and what gardens we have watered sufficiently that they don't dry out. Keep important papers and documents (insurance, property deeds, etc) where they can be gathered up on short notice, also prescription and needed medications in a known place. If ordered to evacuate, get these important items, whatever pets you have, and leave the house. DO NOT stay and try to fight the fire yourself; you are not trained for that. If you have livestock (horses and cattle) open barn doors so they can escape if they need to. They will instinctively (unless they panic, which they are more likely to do if they feel trapped) flee the flames.
The first step in dealing with a fire is to sound the alarm. Call the fire service by dialing the emergency number. Summon help and attack the fire only if you are able. Check the adjacent rooms for people who may have not heard the alarm and give them the warning. Leave the building using the nearest exit.