Clark County
Washington — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 92th
Clark County faces medium composite natural disaster risk (NRI Risk Index score 92.2, 92th national percentile), driven primarily by earthquake and cold wave exposure. Expected annual loss across all 18 hazard types is $157M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Earthquake | Medium | 0.02 / yr | $54M |
| Cold Wave | High | 0.26 / yr | $20M |
| Heat Wave | Medium | 6.95 / yr | $10M |
| Riverine Flood | Medium | 0.32 / yr | $68M |
| Ice Storm | High | 1.86 / yr | $1M |
| Volcanic Activity | Low | 0.01 / yr | $15K |
| Strong Wind | Medium | 0.05 / yr | $2M |
| Landslide | Low | 2.18 / yr | $24K |
| Lightning | Medium | 8.06 / yr | $970K |
| Winter Weather | Medium | 10.79 / yr | $205K |
| Wildfire | Low | 0.00 / yr | $222K |
| Tornado | Low | 0.05 / yr | $717K |
| Coastal Flood | Very Low | 0.23 / yr | $6K |
| Hail | Very Low | 0.06 / yr | $121K |
| Avalanche | Very Low | 0.01 / yr | $16 |
| Drought | Very Low | 0.00 / yr | $0 |
| Hurricane | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Clark County?
Clark County has a composite FEMA National Risk Index score of 92.2 out of 100, placing it in the Medium category and the 92th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Clark County?
The three highest-rated hazards are Earthquake (Medium, $54M EAL), Cold Wave (High, $20M EAL), Heat Wave (Medium, $10M EAL). These account for most of the county's expected annual losses.
How does Clark County compare to other Washington counties?
Clark County ranks #9 of 39 Washington counties for overall natural disaster risk, with a medium rating.
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. Clark County's $157M EAL is a statistical average, not a guarantee for any specific year or address.