AtmostormCounty briefing

Contra Costa County, CA

Severe-weather activation briefing

Generated 2026-09-20T07:48:19.228503+00:00

No active warnings

Radar over Contra Costa County, CA

County exposure (baseline)

Contra Costa County, CA has an estimated 1,228,271 residents, including 30 nursing homes, 20 mobile-home parks, 21 dialysis centers, 5 hospitals and 287 schools. This is the denominator behind “in the warned path”.