Johnson County
Kansas — Natural Disaster Risk Assessment
HighComposite Risk Score
National percentile: 95th
Johnson County faces high composite natural disaster risk (NRI Risk Index score 94.8, 95th national percentile), driven primarily by winter weather and hail exposure. Expected annual loss across all 18 hazard types is $257M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Winter Weather | Very High | 11.26 / yr | $6M |
| Hail | High | 9.24 / yr | $15M |
| Tornado | Very High | 0.32 / yr | $55M |
| Ice Storm | Very High | 0.99 / yr | $5M |
| Heat Wave | High | 14.95 / yr | $27M |
| Lightning | Very High | 51.58 / yr | $5M |
| Cold Wave | High | 2.26 / yr | $31M |
| Riverine Flood | High | 2.54 / yr | $110M |
| Earthquake | Low | 0.00 / yr | $2M |
| Landslide | Low | 0.13 / yr | $8K |
| Wildfire | Very Low | 0.00 / yr | $138K |
| Strong Wind | Low | 6.97 / yr | $758K |
| Drought | Very Low | 6.24 / yr | $18K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Hurricane | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Johnson County?
Johnson County has a composite FEMA National Risk Index score of 94.8 out of 100, placing it in the High category and the 95th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Johnson County?
The three highest-rated hazards are Winter Weather (Very High, $6M EAL), Hail (High, $15M EAL), Tornado (Very High, $55M EAL). These account for most of the county's expected annual losses.
How does Johnson County compare to other Kansas counties?
Johnson County ranks #2 of 105 Kansas counties for overall natural disaster risk, with a high 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. Johnson County's $257M EAL is a statistical average, not a guarantee for any specific year or address.