Flooding and Storms 1 article

Heavy rain, atmospheric rivers, and coastal storms can overwhelm waterways, drainage systems, and roads in California. Floodplain exposure, debris flows, storm surge, and damaged infrastructure create different hazards depending on terrain and development. Warning notices, evacuation preparations, and cleanup decisions affect people before and after a storm. Flood risks can extend beyond mapped riverbanks when debris, blocked drains, or fast runoff threaten developed areas.