Prevention
Most homes ignite from embers — not direct flames. The actions below create the layers of protection that stop embers before they become fires.
“An ounce of prevention is worth a pound of cure.”
In 2014, the Cocos Fire burned through San Marcos in hours. More than 30 homes were destroyed and 2,000+ acres consumed — including neighborhoods that look exactly like San Elijo Hills. Many of those homeowners had no defensible space, no ember-resistant vents, and wood chips against their foundations. Some were uninsured. Some never came back.
Insurance companies have updated their models since 2014. Non-renewals and premium hikes in San Diego's High Fire Hazard Severity Zones have accelerated — and the single most effective response is documented, verifiable home mitigation work. The checklist below is what that looks like in practice.
Prevention has two components: what individual homeowners do around their property, and what the community does collectively through fuel management and Firewise participation. Both matter. The checklist below covers the individual side.
Zone 0 — The First 5 Feet
Zone 0 is where most homes ignite. Embers travel up to a mile ahead of a fire and land in gutters, on decks, and against foundations. If combustible materials are within 5 feet of your home, those embers have fuel. Remove the fuel and the ember has nowhere to start.
Remove all leaves, pine needles, and dead vegetation from your roof and gutters
Replace bark mulch and wood chips with gravel, concrete, or paver stones within 5 feet of structure
Move firewood and propane tanks to Zone 2 — at least 30 feet from any structure
Remove or replace all plants within 5 feet of the house
Clear all debris and stored items from under decks and porches
Prune tree branches to at least 10 feet away from chimneys and stovepipes
Remove vines growing on walls and fences adjacent to the structure
Remove or replace flammable patio furniture on wooden decks
Source: CAL FIRE Defensible Space Guidelines. Regular maintenance of all Zone 0 items is required — not a one-time task.
Zone 1 — 5 to 30 Feet
Reduce fuel density and eliminate fire laddering pathways
Zone 1 — 5 to 30 Feet
Reduce fuel density and eliminate fire laddering pathways
Trim trees so branches have 10-foot horizontal spacing between canopies
Remove dead vegetation — dead grass, shrubs, and branches throughout the zone
Space plants to avoid fire laddering — no continuous pathway of vegetation from ground to tree canopy
Maintain grass height at 4 inches or less through fire season
Zone 2 — 30 to 100 Feet
Thin fuels and maintain natural and constructed fuel breaks
Zone 2 — 30 to 100 Feet
Thin fuels and maintain natural and constructed fuel breaks
Thin trees and shrubs to reduce overall fuel density
Maintain clear vegetation breaks — driveways, pathways, mowed areas act as natural fuel breaks
Remove dead branches and understory vegetation
Create 18-inch vertical clearance between grass and lowest tree branches
Structural HardeningHarden the Structure Itself
Fencing, vents, and gutters — the home's last line of defense
Harden the Structure Itself
Fencing, vents, and gutters — the home's last line of defense
Fencing
Replace wood fences with metal, especially the section immediately adjacent to your home. If full replacement is not feasible, install at least 5 feet of metal fencing where wood fencing connects to the structure.
Vents
Install 1/8-inch mesh metal screens on all vents using ember-resistant designs. Eave vents, crawl space vents, and attic vents are common ember entry points. Use Class A fire-rated roofing materials when replacing or repairing your roof.
Gutters
Install non-combustible gutter covers to prevent debris accumulation. Clean gutters regularly, especially during high wildfire threat periods. A gutter full of dry leaves is one of the most common home ignition points.
Free Assessment Available
The San Marcos Fire Department offers individual defensible space assessments for homeowners. A fire professional walks your property and identifies your highest-priority actions. This is a free service.
Learn About Assessments