Natural disaster risk in Glenn County, California
California · population 28,889 · FIPS 06021
Overall: relatively low risk
Glenn County has a composite risk score of 74.4 out of 100 — higher than 74% of US counties. It ranks 53 of 58 in California (1 = highest risk). Its highest-rated hazards are drought, earthquake, wildfire.
Drought now: No, but abnormally dry (D0)
No drought, but abnormally dry. On the U.S. Drought Monitor map valid 13 October 2026, 100% of Glenn County is D0 Abnormally Dry and none of it is in drought (D1 to D4). Some of it has been abnormally dry or worse for 29 weeks in a row.
Drought in Glenn County: the last 52 weeks · droughtmonitor.unl.edu
The U.S. Drought Monitor is jointly produced by the National Drought Mitigation Center at the University of Nebraska-Lincoln, the United States Department of Agriculture, the National Oceanic and Atmospheric Administration and the National Aeronautics and Space Administration. Map courtesy of NDMC.
Risk, loss, vulnerability and resilience
| Measure | Rating and score |
|---|---|
| Overall risk Expected annual loss, adjusted for social vulnerability and community resilience. |
Relatively low 74.4 |
| Expected annual loss About $40.9 million a year, on average, across all 18 hazards. |
Relatively low 80.3 |
| Social vulnerability Higher means people may find it harder to prepare and recover. |
Very low 14.8 |
| Community resilience Higher means a stronger ability to prepare, adapt and recover. |
Very low 15.1 |
Risk by hazard
FEMA's risk rating for each of 18 natural hazards in Glenn County, highest first. "Not applicable" means the hazard is not modelled here.
| Hazard | Risk rating and score |
|---|---|
| Drought | Relatively high 99 |
| Earthquake | Relatively moderate 92 |
| Wildfire | Relatively moderate 91 |
| Landslide | Relatively low 86 |
| Heat wave | Relatively low 74 |
| Inland (riverine) flooding | Relatively low 42 |
| Volcanic activity | Very low 51 |
| Lightning | Very low 19 |
| Avalanche | Very low 14 |
| Tornado | Very low 8 |
| Hail | Very low 5 |
| Strong wind | Very low 2 |
| Winter weather | Very low 1 |
| Coastal flooding | Not applicable |
| Cold wave | No rating |
| Hurricane | Not applicable |
| Ice storm | Not applicable |
| Tsunami | Not applicable |
FEMA disaster declarations for Glenn County
Federal declarations that designated Glenn County, since 1 Jan 2024 (the period this site keeps from OpenFEMA). Older declarations are in FEMA's own dataset.
Yes. Glenn County has been named in 1 FEMA declaration since 1 Jan 2024. The latest is DR-4769-CA (Severe Winter Storms, Tornadoes, Flooding, Landslides, and Mudslides), declared 13 Apr 2024.
| Declaration | Kind | Incident | Declared | Individual assistance here |
|---|---|---|---|---|
| DR-4769-CA | Major disaster | Severe Winter Storms, Tornadoes, Flooding, Landslides, and Mudslides | 13 Apr 2024 | No |
All FEMA declarations in California, with estimated apply-by dates · Open FEMA deadlines
This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s). Dataset: Disaster Declarations Summaries - v2.
How to read these ratings
- Ratings run in five steps: very low, relatively low, relatively moderate, relatively high and very high. They compare a county with every other US county; they are not a measure of danger on their own.
- Scores run from 0 to 100 and are national percentiles. The bar shows the score: a score of 80 means a higher value than 80% of US counties.
- Overall risk combines the expected annual loss with social vulnerability and community resilience.
- Expected annual loss is the average yearly loss to buildings, people and agriculture the model expects from all 18 hazards.
- Social vulnerability describes how hard it may be for people to prepare for and recover from a disaster. Higher is worse.
- Community resilience describes a community's ability to prepare, adapt and recover. Higher is better.
- "Not applicable" means FEMA does not model that hazard there (for example, hurricanes far inland).
About this data
Source: FEMA National Risk Index, version 1.20, released December 2025, published by the Federal Emergency Management Agency (US public domain). About the National Risk Index. The index is a model of relative risk built from historical hazard records, what is exposed and community factors. It is not a forecast, it does not describe any single property, and it is not insurance or financial advice. For decisions about a specific address, check FEMA's flood maps and your local emergency management office.
Questions
What is the natural disaster risk in Glenn County, California?
FEMA's National Risk Index rates the overall risk in Glenn County as relatively low, with a score of 74.4 out of 100 (higher than 74% of US counties). That is a comparison with other US counties, not a forecast.
What are the biggest natural hazards in Glenn County?
The hazards rated highest for Glenn County are drought (relatively high), earthquake (relatively moderate), wildfire (relatively moderate).
What is the flood risk in Glenn County?
FEMA rates inland (river and rain) flooding risk in Glenn County as relatively low. For a specific property, check the FEMA flood map and your local floodplain office.
Has Glenn County had a FEMA disaster declaration?
Yes. Glenn County has been named in 1 FEMA declaration since 1 Jan 2024. The latest is DR-4769-CA (Severe Winter Storms, Tornadoes, Flooding, Landslides, and Mudslides), declared 13 Apr 2024.
Is Glenn County in a drought?
No drought, but abnormally dry. On the U.S. Drought Monitor map valid 13 October 2026, 100% of Glenn County is D0 Abnormally Dry and none of it is in drought (D1 to D4). Some of it has been abnormally dry or worse for 29 weeks in a row.
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