Cities with first-time fire zone designations include Santa Monica, La Cañada-Flintridge, South Pasadena, Alhambra, Huntington Beach and Laguna Hills.

Cal Fire's new maps for Southern California added 3.5 million acres into fire-hazard zones, increasing the acreage in the highest hazard zone by 26%.

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.