More than 3.5 million additional acres across Southern California, including Los Angeles County, have been designated as fire hazard zones under updated maps released on Monday by the California Department of Forestry and Fire Protection (Cal Fire).

Two months after the most destructive wildfires in Los Angeles history, Cal Fire has released updated Fire Hazard Severity Zone maps for the county. The surveys use various criteria to identify wildfire hazard areas and rank them on a three-tiered scale.

Cal Fire said the maps are proactive, to be used in wildland-urban interface building standards for new construction and natural hazard real estate disclosures at the time of sale.