Newport Beach hears wildfire "fire pathways" assessment; city to prioritize Buck Gully mitigation and home hardening

Fire Chief Jeff Boyles and a retired chief laid out a new "fire pathways" assessment on Sept. 9 that models where wind-driven fires are most likely to enter Newport Beach and how the city can best reduce the risk to neighborhoods.

The presentation, given by retired Chief Dave Winaker and introduced by Chief Boyles, said wildfire behavior in the city is driven by three inputs ' topography, fuel and weather ' and that fast-moving, wind-driven events have accounted for a disproportionate share of structure losses in the American West. "Fire is driven by topography, fuel, and weather. That's it," Winaker said, summarizing the modeling approach.

Why it matters: The modeling identifies "points of entry" where vegetative fires can transition to structure fires. Officials said targeting mitigation to those entry points is the most effective use of limited resources: continuing fuel management zones (FMZs) where they exist, expanding defensible space and encouraging home hardening where FMZs are not feasible.

The department highlighted two common wind scenarios for the area ' north-northeast Santa Ana events and west-to-east coastal dry-air events ' and showed how ignition lines and gullies could funnel fire toward neighborhoods. Chief Boyles described the work as "operationally" valuable for placing units and prioritizing mitigations, including the use of an AI camera partnership and fuel-management collaboration with Cal Fire and Public Works.

Fire Marshal James Gillespie told council the city provides a free wildfire assessment for homeowners that looks at siding, vents, roof type and defensible-space measures. He said the department has applied for and is processing grants to fund work in Buck Gully: "That particular zone ... we do have a grant that's going to run that entire area to create a 100-foot buffer from the parcel line out into Buck Gully, clean it up, get the nonnative vegetation, the dead and dying, limb up trees, spray, space shrubs. And we're gonna do that with public works and maintaining that in perpetuity," Gillespie said.

Council reaction and next steps: Council members praised the presentation and pressed staff on next steps, emphasizing resident action on defensible space and the potential for outreach and incentives to encourage home hardening in older neighborhoods adjacent to gullies. One council member asked staff to share the modeling and consider evacuation and response planning tied to the model results.

What remains unresolved: Officials said the model shows where mitigation will have the biggest effect, but much of the remaining work depends on private property actions (home hardening, defensible space) and securing funding for complementary treatments. The department recommended continued outreach, incentives and grant pursuit.

The presentation included a Q&A with council and concluded with the mayor thanking the fire department; no formal action was taken at the meeting beyond discussion and direction to continue work and pursue grant-funded mitigation.