All told, the size of orange and red patches on the new maps is 3,626 square miles — an area nearly twice the size of Delaware.

More than 800,000 acres of land across these SoCal counties have been classified under the highest fire hazard severity zone level.

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.