Orange, Riverside, San Bernardino and San Diego counties and show which areas are more susceptible to wildfires. These released maps are the final phase in a rollout of updated maps for California.

Some cities had fewer acres in the very high risk designation, but most of the region had more high risk acreage.

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.