The California Department of Forestry and Fire Protection (Cal Fire) has updated fire-hazard severity maps for Los Angeles County for the first time in over a decade. Released on Monday, these new maps add more than 440,000 acres to the county’s fire hazard zones, including a 30% increase in areas rated as the highest severity.
This update is part of a broader rollout across Southern California and marks the end of a two-month process by Cal Fire. Local residents will now have about five months to provide feedback on the maps before the city and county implement stricter fire safety regulations in the newly designated areas.
Previously, Cal Fire only identified the highest hazard zones, labeled “very high.” The new maps expand this classification to include “moderate” and “high” zones, which cover areas where local fire departments, like the Los Angeles Fire Department and the Los Angeles County Fire Department, respond to fires.
In the city of Los Angeles, the “very high” hazard zone has grown by 7%. The introduction of the new “moderate” and “high” zones has led to a total increase of 24% in the overall fire hazard area. In contrast, unincorporated areas of L.A. County, which depend on the Los Angeles County Fire Department for fire response, saw their “very high” zone acreage more than triple. These areas, which include places like Altadena and the outskirts of Santa Clarita, are more vulnerable due to their proximity to wildlands.
Rep. George Whitesides emphasized the urgency of addressing the ongoing wildfire crisis in California, urging swift action to protect communities and ensure that insurance markets remain viable for residents.
The updated maps reflect a concerning trend statewide, with a total of 6.8 million acres now classified as “very high” hazard zones, a 35% increase from previous assessments. The new classifications also include 1.2 million acres in “high” zones and 4.5 million acres in “moderate” zones.
These maps are crucial for fire safety regulations in California. Homeowners in “high” and “very high” zones must adhere to fire-safe building codes for new constructions. This includes installing multi-pane windows and securing vents to prevent embers from entering homes. Additionally, those in “very high” zones must maintain defensible space around their properties and disclose their hazard status when selling their homes.
Local governments in these heightened severity zones are required to review evacuation routes and consider the impact on water supplies during disasters. They must also locate essential public facilities outside of high-risk areas whenever possible.
Cal Fire had initially planned to release the maps earlier this year, but delays occurred due to the firestorms that hit the region. The new maps indicate that areas such as Pacific Palisades and Malibu remain in the “very high” zone, while Altadena is largely unzoned, suggesting a lower hazard level.
Despite the updates, some experts have expressed concerns about the accuracy of these hazard assessments. An analysis found that only 21% of properties in the recent Eaton fire perimeter were classified as “very high” risk, while an independent assessment indicated that 94% had severe or extreme wildfire risk.
Cal Fire acknowledges that its methods for mapping fire hazards cannot fully predict how wildfires will spread into urban areas. The agency’s models consider vegetation, topography, climate, and weather, but they may not account for sudden, extreme fire conditions.
The new maps have sparked discussions about land use and development in fire-prone areas. Experts emphasize that while climate change plays a role in wildfire severity, past land-use decisions have significantly contributed to the problem.
As local jurisdictions prepare to implement these new regulations, it is clear that fire safety remains a pressing issue for communities across California. The updated hazard maps are intended to provide essential information for rebuilding efforts and to enhance safety measures in vulnerable areas.