Porter County
Indiana — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 81th
Porter County faces medium composite natural disaster risk (NRI Risk Index score 81.4, 81th national percentile), driven primarily by tornado and cold wave exposure. Expected annual loss across all 18 hazard types is $58M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Tornado | High | 0.32 / yr | $14M |
| Cold Wave | High | 3.53 / yr | $13M |
| Strong Wind | High | 5.26 / yr | $3M |
| Riverine Flood | Medium | 1.54 / yr | $25M |
| Winter Weather | Medium | 15.58 / yr | $198K |
| Heat Wave | Low | 3.11 / yr | $1M |
| Earthquake | Low | 0.00 / yr | $971K |
| Wildfire | Very Low | 0.00 / yr | $112K |
| Lightning | Medium | 43.28 / yr | $387K |
| Landslide | Very Low | 0.09 / yr | $2K |
| Ice Storm | Low | 1.11 / yr | $98K |
| Hail | Very Low | 3.29 / yr | $166K |
| Coastal Flood | Very Low | 0.01 / yr | $4K |
| Hurricane | Very Low | 0.01 / yr | $4K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Drought | 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 Porter County?
Porter County has a composite FEMA National Risk Index score of 81.4 out of 100, placing it in the Medium category and the 81th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Porter County?
The three highest-rated hazards are Tornado (High, $14M EAL), Cold Wave (High, $13M EAL), Strong Wind (High, $3M EAL). These account for most of the county's expected annual losses.
How does Porter County compare to other Indiana counties?
Porter County ranks #11 of 92 Indiana 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. Porter County's $58M EAL is a statistical average, not a guarantee for any specific year or address.