When houses are surveyed for wildfire vulnerabilities, quite often the garage is not considered even though it could be the most hazardous aspect of the house.

ID Question Example
G1 Is there an attached garage or one close (within 30') to the home? (If no, go to next section.) Garage:
G2 Does the garage have a vehicle access door? (If no, go to next section.) Non-closing garage:
  If the garage has a vehicle access door, the door should be closed to ensure that embers and flames do not enter. Garage (vehicle access) doors are typically 'leaky' to embers. Combustible materials should not be stored in the garage; however, because combustible materials are often stored in the garage, it is even more important to ensure that it is resistant to embers and ignition.
G3 Are there any gaps under or around garage doors? Gaps around garage door:
  Gaps at the top, bottom and edges of doors can let glowing embers enter, and we all know that garages are full of combustible materials. Garages can have vents at various locations, especially if they contain gas furnaces or hot water heaters (for make up air). These vents are also easy entry points for embers. Vents that resist intrusion of embers and flame have been designed and are becoming commercfially available. If the vents in garage doors can't be eliminated (for safety reasons), the newer vents could be used in these, and other, locations.

Next => Siding