Using data from the 2020 U.S. Census, the San Mateo County Board of Supervisors on Tuesday approved new supervisorial district boundaries that will stay in effect for a decade.

For the local maps just released, changes to the existing tsunami hazard maps show that in a worst-case tsunami, sizeable areas of Alameda, Oakland, and Berkeley could be flooded up to an 18-foot ...

Though San Francisco was the 12th-largest city in the United States in 1940, with a population of 634,536, the relief map shows many areas of the city as undeveloped - the Sunset District, parts ...

The maps are part of a state program to identify every county where any hazards exist. The program was created after the 1989 Loma Prieta earthquake. The program has already mapped some areas in ...

Like many Peninsula cities, South San Francisco has seen some changes in its fire hazard zones since the state’s latest update, with several moderate-hazard zones situated in the northern part ...

A new map released by the California Department of Conservation shows seismic hazard zones for certain areas of San Mateo and Contra Costa counties, specifically liquefaction and landslide zones.