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Five fires explain why 14 Orange County cities and the canyon communities now carry Very High hazard designations, and why the ember-resistant zone rules exist.
The record
And in 2024, the Airport Fire burned 23,526 acres and 160 structures, reaching Trabuco Canyon and the Robinson Ranch and Trabuco Highlands neighborhoods on Rancho Santa Margarita's edge. Three of the county's six defining fires touched Trabuco Canyon.
The pattern is the point. Wind-driven fire moving through canyon corridors, embers arriving ahead of the flame front, and the same communities in the path each time. Zone Zero exists because ember ignition at the structure is the failure mode these fires keep demonstrating. Each community page on this site carries its own specific history: start with Silverado Canyon or Yorba Linda.
Questions
The Santiago Fire (2007, 28,445 acres, arson) and Bond Fire (2020, 6,686 acres, 31 structures destroyed, 25,000 evacuated) both burned the eastern canyon communities. The Freeway Complex Fire (2008, 30,305 acres, 314 residences) hit Yorba Linda and Anaheim Hills. The Coastal Fire (2022) destroyed 20+ homes in Laguna Niguel, and the Airport Fire (2024, 23,526 acres, 160 structures) burned into Trabuco Canyon and Rancho Santa Margarita's edge neighborhoods.
Because the maps follow the fires. The communities that burned in 2007 burned again in 2020, and the 2025 hazard remap put them and their neighbors in the Very High tier that triggers Zone 0. History is the evidence behind the requirement.
Yes, almost exactly. The Santiago Fire (2007) and Bond Fire (2020) burned through nearly the identical set of canyon communities: Silverado, Modjeska, Williams, Trabuco, and Portola Hills among them, thirteen years apart.
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