Hazard library

Alameda County hazards

Learn what local hazards mean, why they matter, how StayReady checks them, and which official public sources support this independent educational tool.

Current location

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Core hazard guides

Hazards StayReady checks

These guides explain the current map checks and reviewed preparedness sources.

Earthquake

Earthquakes can cause strong shaking, falling objects, utility disruption, building damage, and recovery challenges across Alameda County.

Why it matters locally: Alameda County is part of an active earthquake region. Shaking can affect every community, while mapped fault, liquefaction, and landslide conditions vary by location.
How StayReady checks it: Regional shaking context, nearby mapped faults, and three California Geological Survey zone layers.

Official sources used

United States Geological Survey, California Geological Survey, California Geological Survey, California Geological Survey, Ready.gov

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Flood

Flooding can damage homes and belongings, interrupt roads and utilities, and create health and recovery challenges.

Why it matters locally: Creeks, shorelines, drainage systems, low-lying areas, and severe storms can create different flood concerns across Alameda County.
How StayReady checks it: Regional flood preparedness context and the FEMA flood layer at an address point.

Official sources used

Federal Emergency Management Agency, Ready.gov

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Wildfire

Wildfire can affect communities through fire, smoke, evacuation, road closures, power disruption, and difficult recovery.

Why it matters locally: Hillside vegetation, dry weather, wind, smoke, and constrained evacuation routes make wildfire preparedness relevant across Alameda County.
How StayReady checks it: Regional wildfire, smoke, and evacuation context plus the CAL FIRE Fire Hazard Severity Zone layer at an address point.

Official sources used

CAL FIRE, City of Berkeley

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Local planning context

Other regional hazards under review

These topics already appear in Alameda County or local preparedness planning. They are not ranked here and do not yet have complete StayReady address-level guides.