Alameda, CA
Alameda County in California has 9 FEMA disaster declarations on record covering 1970–2023, most recently Severe Winter Storms, Flooding, Landslides, and Mudslides on Jan 14, 2023 (DR-4683). Its flood risk grade is A (Low risk), ranking #349 of 3,277 U.S. counties, with 24 NFIP flood insurance claims totaling $323,458 in payouts. Flood risk is relatively low compared to the national average.
FEMA Disaster Declarations in Alameda County
The 9 most recent federally declared disasters affecting Alameda County, CA (1970–2023). Total declarations on record: 9.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| Jan 14, 2023 | Flood | Severe Winter Storms, Flooding, Landslides, and Mudslides | DR-4683 |
| Jan 9, 2023 | Flood | Severe Winter Storms, Flooding, and Mudslides | DR-3591 |
| Apr 1, 2017 | Flood | Severe Winter Storms, Flooding, and Mudslides | DR-4308 |
| Mar 16, 2017 | Flood | Severe Winter Storms, Flooding, and Mudslides | DR-4305 |
| Sep 13, 2005 | Hurricane | Hurricane Katrina Evacuation | DR-3248 |
| Feb 21, 1986 | Flood | Severe Storms & Flooding | DR-758 |
| Feb 9, 1983 | Coastal Storm | Coastal Storms, Floods, Slides & Tornadoes | DR-677 |
| Jan 7, 1982 | Flood | Severe Storms, Flood, Mudslides & High Tide | DR-651 |
| Feb 16, 1970 | Flood | Severe Storms & Flooding | DR-283 |
Score Breakdown
The composite score of 18 is calculated from four weighted factors. See our methodology for details.
Other Counties in California
| County | Grade | Score | Claims | Disasters |
|---|---|---|---|---|
| Lake | A | 19 | 28 | 8 |
| Monterey | A | 19 | 28 | 10 |
| San Mateo | A | 19 | 33 | 9 |
| Santa Clara | A | 19 | 39 | 8 |
| Kern | A | 17 | 13 | 10 |
| Los Angeles | A | 17 | 163 | 12 |
More Counties in California
Frequently Asked Questions
How many FEMA disaster declarations does Alameda County, CA have?
Alameda County, CA has 9 federal disaster declarations on FEMA record (1970–2023). The 5 most recent are: Severe Winter Storms, Flooding, Landslides, and Mudslides (declared Jan 14, 2023, DR-4683); Severe Winter Storms, Flooding, and Mudslides (declared Jan 9, 2023, DR-3591); Severe Winter Storms, Flooding, and Mudslides (declared Apr 1, 2017, DR-4308); Severe Winter Storms, Flooding, and Mudslides (declared Mar 16, 2017, DR-4305); Hurricane Katrina Evacuation (declared Sep 13, 2005, DR-3248). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for Alameda County, CA?
Alameda County is graded A (composite score 18/100, low risk). It ranks #349 of 3,277 U.S. counties for flood risk in our scoring model. The grade combines NFIP claims density (40%), disaster frequency (25%), claim severity (20%), and year-over-year trend (15%).
How many NFIP flood insurance claims have been filed in Alameda County?
24 NFIP flood insurance claims have been filed in Alameda County, CA, totaling $323,458 in payouts. The average claim is $13,477. Source: FEMA FimaNfipClaims v2 dataset.
Has Alameda County, CA had any recent flood disasters?
Yes. The most recent FEMA declaration affecting Alameda County was Severe Winter Storms, Flooding, Landslides, and Mudslides on Jan 14, 2023 (DR-4683). The county has 9 declared disasters in the OpenFEMA record covering 1970–2023.
The this entity record above pulls directly from FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims. What follows is the per-entity context — how this entity sits in the broader U.S. flood risk, NFIP claims, and disaster declarations distribution and which underlying factors drive the headline numbers.
The methodology behind every numeric value on this page is publicly documented on the FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. ZIPs, counties, and states. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Source: FEMA OpenFEMA datasets, 2026.