How to Protect Your Home From Wildfires with Defensible Space


Wildfires are never out of season. Create a defensible space to improve your home’s chance of surviving a wildfire and to help protect the firefighters defending your home.

What is Defensible Space?

Defensible space refers to that area between a house and an oncoming wildfire where the vegetation has been modified to reduce the wildfire threat and to provide an opportunity for structural protection without risking homeowner or firefighter lives. Sometimes, a defensible space is simply a homeowner’s properly maintained yard.

ZONE 1: 0 - 30 feet from buildings

  • Trim or prune shrubs/vegetation to a height of 2 feet and provide clear space around each plant of at least 4 feet.

  • Remove all flammable material from the ground, under decks, and around propane tanks.

  • Keep roofs and gutters clear of debris.

ZONE 2: 30 - 100 feet from buildings

  • Remove all vegetation that would allow flames to climb up vegetation or buildings.

  • Trim limbs a minimum of 6 feet from ground.

  • Create islands of shrubs, thinning them enough to walk between them.

  • On slopes greater than 20% gradient, treatment should be extended an additional 100 feet from structures.

  • Stack wood piles at least 30 feet from structures.

  • Never prune near power lines, call your local utility company first.

​What is FIREWISE?

Firewise is a mind-set and action of overcoming the challenges necessary for communities in fire prone ecosystems to live with wildfire. It is a multi-agency program that encourages the development of defensible and survivable space and the prevention of disastrous wildfire.

Fuel

Fuel is required for any fire to burn. In regard to wildland fire, fuels consist of live and dead vegetation, such as trees, shrubs, grasses and their debris. Structures also become a potential source of fuel when they are in the vicinity of a wildfire. The amount of fuel, its moisture content, arrangement and other characteristics influence fire behavior.

Weather

Dry, hot and windy weather increases the likelihood of a major wildfire to occur. These conditions make ignition easier, allow fuels to burn more rapidly, and increase fire intensity. High wind speeds, in particular, can transform a small, easily controllable fire into a catastrophic event in a matter of minutes.

Topography

Since heat rises, steepness of slope greatly influences fire behavior and rate of fi re spread. Slopes with south and southwest aspects tend to be drier and more prone to ignition. Steep, narrow drainages and canyons act like chimneys when wildfires occur.

Human Development

When people choose to build or buy homes in high-hazard fire areas their homes are potential fuel. Untreated wood shake and shingle roofs, narrow roads, limited access, lack of firewise landscaping, inadequate water supplies and inadequately planned subdivisions increase the risk of wildfire to people and their property.

Wildfires in the Southwest

Much of the Southwest is considered a high-hazard fire environment. Based on recent history and experience, these areas possess all of the ingredients necessary to support large, intense and uncontrollable wildfires.

Within this hazardous environment are individual houses, subdivisions and entire communities. Many homeowners, however, are ill-prepared to survive an intense wildfire. It is not a question of "if" a wildfire will occur but when. As such, the odds of losing human life and property are growing

Our ability to live more safely in this fire environment depends on pre-fire proactivity. Actions taken before a wildfire occurs that improve the survivability of people and homes.

Be proactive and firewise when it comes to your home and business!

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