In some areas, hazards have surged. Buildings in the highest hazard zones will be subject to the strictest fire-resiliency rules.

SACRAMENTO, Calif. — CalFire released a new map this week, expanding hazardous fire zones in Northern California. It's part of Governor Gavin Newsom's executive order after the Los Angeles fires.

The USGS has monitoring stations strategically scattered around the Bay Area in landslide-prone areas. The agency also has years of monitoring data to compare with real-time data, which helps ...