Research and post–urban-conflagration damage assessments show that a single home ignition can spread fire across an entire community when winds are strong and homes are closely spaced.

In Serrano, most homes are within 10 feet of the adjacent home. While some larger-lot production homes and custom homes have greater separation, structure-to-structure fire spread remains a significant risk under wind-driven wildfire conditions. Studies have shown that separation has to be between 30 and 40 feet to avoid destroyed homes.

Block Vulnerabilities

Streetscape vegetation and bark next to wood fences

Wood fences and bark connecting homes on the block

Vegetation and combustible materials in Zone 0

Sideyard vegetation and combustible materials outside Zone 0

Old style attic, roof, gable, and crawlspace vents

Embers, flames, and radiant heat generated by a house fire on the block