A burned home destroyed by the Eaton Fire that started on Jan. 7 in Altadena.
California – California’s wildfire hazard zones have expanded significantly, as revealed in the final release of updated color-coded hazard maps from the state’s firefighting agency, Cal Fire. The maps, which mark areas at risk of wildfires in yellow, orange, and red, demonstrate a dramatic 168% increase in high-risk zones since the last local hazard assessment in 2011.
Among the newly identified danger zones, Mendocino County’s hills are now streaked with yellow, Bakersfield’s aqueduct area has been marked with burnt orange, and a striking crimson swath east of Chico highlights extreme fire risk. In total, the maps depict 3,626 square miles of high or very high wildfire hazard—an area nearly twice the size of Delaware—impacting approximately 3.7 million Californians.
Cal Fire has been rolling out these maps over the past six weeks, with the final set covering Los Angeles, Orange, San Diego, and regions south of Owens Valley. The maps only include local responsibility areas managed by municipal fire departments, while state-controlled wildfire zones were updated in 2022. Federal lands, which constitute about 45% of California, remain outside the scope of this mapping project.
The updated maps reflect growing public anxiety over wildfires, exacerbated by recent devastating fires in Los Angeles and ongoing instability in the state’s home insurance market. The findings highlight how climate change, advanced modeling techniques, and legal mandates have all contributed to the expansion of hazard zones.
Cal Fire attributes the increase in hazard zones to three key factors:
- Climate Change – Higher temperatures and prolonged drought conditions have intensified fire weather and dried vegetation, making wildfires more likely.
- Improved Technology – New modeling tools allow for more precise fire risk assessments, including hyperlocal weather simulations and detailed ember size predictions.
- Legal Requirements – A 2021 state law mandated the inclusion of moderate, high, and very high hazard zones across both local and state jurisdictions, expanding the scope of the maps.
With the updated maps come regulatory changes for homeowners in affected areas. In high-hazard (orange) zones, newly built homes must meet strict fire-resistant building standards, and property sellers must disclose wildfire risks to buyers. Those in very high-risk (red) zones face even stricter requirements, including clearing 100 feet of defensible space around their homes and ensuring new subdivisions have multiple evacuation routes and adequate water infrastructure.
These maps do not factor in individual home improvements, such as fire-resistant retrofitting or vegetation management, but rather highlight areas where mitigation efforts are necessary.
Homeowners are already concerned about how these hazard maps will impact insurance availability and property values. Many insurers have been withdrawing from fire-prone areas, leaving residents with limited and costly options like the state’s FAIR Plan, a last-resort policy. Past studies suggest properties in designated hazard zones may sell for less, as buyers weigh the risks and insurance costs.
Despite public concerns, real estate professionals in high-risk areas remain relatively unfazed. Many argue that fire hazard designations have long been part of home sales disclosures, and that insurance challenges, economic uncertainty, and high interest rates pose greater threats to the housing market than new hazard maps.
While the maps provide crucial information for fire prevention and community planning, they do not account for human-made factors that influence fire spread, such as urban development patterns and infrastructure vulnerabilities. Cal Fire officials emphasize the need for continued refinement in risk assessments to help communities better prepare for future wildfires.
