Santa Cruz County, California Natural Disaster Risk
FEMA National Risk Index assessment · CA
HighComposite Risk Score
National percentile: 98th
Santa Cruz County faces high composite natural disaster risk (NRI Risk Index score 97.8, 98th national percentile), driven primarily by drought and earthquake exposure. Expected annual loss across all 18 hazard types is $335M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Risk Overview
Santa Cruz County carries a high composite natural disaster risk, with a National Risk Index score of 97.8 out of 100 — placing it in the 98th national percentile and in the upper tier of natural-disaster risk nationally. The score blends Expected Annual Loss, Social Vulnerability, and Community Resilience across all 18 FEMA hazard types.
Risk here concentrates in drought (extended dry periods that stress water supplies and agriculture) at High risk — $18M in expected annual loss and about 38.24 events per year; earthquake (ground shaking from sudden movement along geologic faults) at High risk — $190M in expected annual loss and about 0.16 events per year; and landslide (downhill movement of rock, soil, and debris on unstable slopes) at High risk — $2M in expected annual loss and about 6.50 events per year. Across all hazards, FEMA estimates $335M in expected annual loss for a population of 270K.
Beyond physical exposure, Santa Cruz County has a low social vulnerability rating (how susceptible the population is to harm) and a high community resilience rating (its capacity to prepare for and recover from disasters). A less vulnerable population paired with strong resilience helps the community absorb and recover from events.
History supports the rating: Santa Cruz County has received 34 federal disaster declarations since 1977, including 9 for severe storm events and 9 for fire events. The most recent was Severe Winter Storms, Tornadoes, Flooding, Landslides, and Mudslides (severe storm), declared in April 2024.
Among 58 California counties, Santa Cruz County ranks #19 for overall natural disaster risk.
Top Hazards
All 18 Hazard Risks
| Drought | High | 38.24 / yr | $18M |
| Earthquake | High | 0.16 / yr | $190M |
| Landslide | High | 6.50 / yr | $2M |
| Wildfire | Medium | 0.00 / yr | $9M |
| Riverine Flood | High | 1.61 / yr | $105M |
| Heat Wave | Medium | 5.37 / yr | $3M |
| Tsunami | Medium | 0.39 / yr | $8M |
| Lightning | Medium | 4.17 / yr | $353K |
| Coastal Flood | Low | 3.10 / yr | $117K |
| Hail | Very Low | 0.03 / yr | $149K |
| Winter Weather | Low | 1.00 / yr | $35K |
| Tornado | Very Low | 0.03 / yr | $235K |
| Strong Wind | Very Low | 0.02 / yr | $53K |
| Avalanche | Very Low | 0.01 / yr | $1 |
| Cold Wave | Very Low | 0.00 / yr | $0 |
| Hurricane | Very Low | 0.00 / yr | $0 |
| Ice Storm | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Disaster History
Santa Cruz County has received 34 federal disaster declarations since 1977, most recently Severe Winter Storms, Tornadoes, Flooding, Landslides, and Mudslides in April 2024. Most frequent causes: Severe Storm (9), Fire (9), Flood (8).
| Declared | Type | Disaster |
|---|---|---|
| April 2024 | Severe Storm | Severe Winter Storms, Tornadoes, Flooding, Landslides, and Mudslides |
| April 2023 | Severe Storm | Severe Winter Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides |
| March 2023 | Flood | Severe Winter Storms, Flooding, Landslides, and Mudslides |
| January 2023 | Flood | Severe Winter Storms, Flooding, Landslides, and Mudslides |
| January 2023 | Flood | Severe Winter Storms, Flooding, and Mudslides |
| August 2020 | Fire | Wildfires |
| August 2020 | Fire | Czu Lightning Fire Complex |
| March 2020 | Biological | Covid-19 Pandemic |
| March 2020 | Biological | Covid-19 |
| April 2017 | Flood | Severe Winter Storms, Flooding, and Mudslides |
Showing the 10 most recent of 34 declarations.
Source: FEMA Disaster Declarations Summaries (OpenFEMA).
Frequently Asked Questions
What is the overall natural disaster risk for Santa Cruz County?
Santa Cruz County has a composite FEMA National Risk Index score of 97.8 out of 100, placing it in the High category and the 98th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Santa Cruz County?
The three highest-rated hazards are Drought (High, $18M EAL), Earthquake (High, $190M EAL), Landslide (High, $2M EAL). These account for most of the county's expected annual losses.
How does Santa Cruz County compare to other California counties?
Santa Cruz County ranks #19 of 58 California counties for overall natural disaster risk, with a high rating.
How many federally declared disasters has Santa Cruz County had?
FEMA records 34 federal disaster declarations for Santa Cruz County since 1977, most often 9 for severe storm events and 9 for fire events. The most recent was Severe Winter Storms, Tornadoes, Flooding, Landslides, and Mudslides, declared in April 2024.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. Santa Cruz County's $335M EAL is a statistical average, not a guarantee for any specific year or address.