Wildfire Risk in California
All California counties ranked by FEMA National Risk Index wildfire score
Wildfire risk — uncontrolled fires that spread across wildland and into communities — is rated for 58 of 58 California counties in FEMA's National Risk Index. Riverside County carries the state's highest wildfire score at 100.0, with $347M in expected annual wildfire losses.
30 California counties are rated High or Very High for wildfire, and expected annual losses from wildfire total roughly $1.79B statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Wildfire
| # | County | Wildfire Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Riverside County | Very High | 0.02 / yr | $347M | |
| 2 | San Diego County | Very High | 0.03 / yr | $430M | |
| 3 | Los Angeles County | Very High | 0.01 / yr | $155M | |
| 4 | San Bernardino County | Very High | 0.01 / yr | $146M | |
| 5 | Orange County | High | 0.01 / yr | $58M | |
| 6 | Ventura County | High | 0.01 / yr | $50M | |
| 7 | Kern County | High | 0.01 / yr | $38M | |
| 8 | El Dorado County | High | 0.01 / yr | $55M | |
| 9 | Shasta County | High | 0.01 / yr | $35M | |
| 10 | Calaveras County | High | 0.01 / yr | $30M | |
| 11 | Madera County | High | 0.01 / yr | $23M | |
| 12 | Nevada County | High | 0.01 / yr | $32M | |
| 13 | Tuolumne County | High | 0.01 / yr | $27M | |
| 14 | Santa Barbara County | High | 0.01 / yr | $24M | |
| 15 | Lake County | High | 0.02 / yr | $20M | |
| 16 | Mariposa County | High | 0.02 / yr | $15M | |
| 17 | Monterey County | High | 0.01 / yr | $17M | |
| 18 | Placer County | High | 0.01 / yr | $25M | |
| 19 | Siskiyou County | High | 0.01 / yr | $14M | |
| 20 | Plumas County | High | 0.01 / yr | $13M | |
| 21 | Butte County | High | 0.00 / yr | $16M | |
| 22 | Tehama County | High | 0.01 / yr | $16M | |
| 23 | Trinity County | High | 0.03 / yr | $13M | |
| 24 | Fresno County | High | 0.00 / yr | $14M | |
| 25 | San Luis Obispo County | High | 0.01 / yr | $17M | |
| 26 | Sonoma County | High | 0.00 / yr | $17M | |
| 27 | Amador County | High | 0.01 / yr | $14M | |
| 28 | Tulare County | High | 0.00 / yr | $10M | |
| 29 | Mendocino County | High | 0.00 / yr | $8M | |
| 30 | Alameda County | High | 0.01 / yr | $12M | |
| 31 | Contra Costa County | Medium | 0.00 / yr | $11M | |
| 32 | Lassen County | Medium | 0.01 / yr | $7M | |
| 33 | Santa Clara County | Medium | 0.01 / yr | $10M | |
| 34 | Santa Cruz County | Medium | 0.00 / yr | $9M | |
| 35 | Yuba County | Medium | 0.01 / yr | $7M | |
| 36 | Napa County | Medium | 0.00 / yr | $5M | |
| 37 | Sacramento County | Medium | 0.00 / yr | $5M | |
| 38 | Sierra County | Medium | 0.02 / yr | $3M | |
| 39 | Humboldt County | Medium | 0.00 / yr | $3M | |
| 40 | San Benito County | Medium | 0.01 / yr | $6M | |
| 41 | Stanislaus County | Medium | 0.01 / yr | $4M | |
| 42 | Marin County | Medium | 0.00 / yr | $4M | |
| 43 | Solano County | Medium | 0.01 / yr | $3M | |
| 44 | Modoc County | Medium | 0.01 / yr | $2M | |
| 45 | Merced County | Medium | 0.01 / yr | $2M | |
| 46 | San Mateo County | Medium | 0.00 / yr | $2M | |
| 47 | San Joaquin County | Medium | 0.00 / yr | $2M | |
| 48 | Glenn County | Medium | 0.00 / yr | $2M | |
| 49 | Mono County | Medium | 0.00 / yr | $2M | |
| 50 | Colusa County | Medium | 0.01 / yr | $1M | |
| 51 | Alpine County | Medium | 0.01 / yr | $1M | |
| 52 | Yolo County | Low | 0.00 / yr | $988K | |
| 53 | Del Norte County | Low | 0.00 / yr | $650K | |
| 54 | Inyo County | Low | 0.00 / yr | $429K | |
| 55 | Kings County | Low | 0.00 / yr | $245K | |
| 56 | Sutter County | Low | 0.00 / yr | $272K | |
| 57 | Imperial County | Low | 0.00 / yr | $184K | |
| 58 | San Francisco County | Very Low | 0.00 / yr | $13K |
58 California counties with measurable wildfire risk. See the national wildfire ranking or all California counties by overall risk.
Frequently Asked Questions
Which California county has the highest wildfire risk?
Riverside County has the highest FEMA wildfire risk score in California at 100.0 (Very High), with $347M in expected annual losses and about 0.02 events per year.
How many California counties face significant wildfire risk?
58 California counties record measurable wildfire risk in FEMA's National Risk Index; 30 of them are rated High or Very High.