Indian River County, Florida Natural Disaster Risk
FEMA National Risk Index assessment · FL
HighComposite Risk Score
National percentile: 96th
Indian River County faces high composite natural disaster risk (NRI Risk Index score 95.6, 96th national percentile), driven primarily by hurricane and lightning exposure. Expected annual loss across all 18 hazard types is $163M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Risk Overview
FEMA's National Risk Index rates Indian River County at high composite risk, with a National Risk Index score of 95.6 out of 100 — placing it in the 96th 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 hurricane (tropical cyclones bringing extreme wind, rain, and storm surge) at Very High risk — $132M in expected annual loss and about 0.31 events per year; lightning (electrical discharges from storms that ignite fires and cause casualties) at High risk — $1M in expected annual loss and about 77.49 events per year; and wildfire (uncontrolled fires that spread across wildland and into communities) at Low risk — $863K in expected annual loss and about 0.01 events per year. Across all hazards, FEMA estimates $163M in expected annual loss for a population of 160K.
Beyond physical exposure, Indian River County has a high 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). Higher vulnerability is partly offset by strong community resilience and recovery capacity.
History supports the rating: Indian River County has received 35 federal disaster declarations since 1977, including 22 for hurricane events and 5 for fire events. The most recent was Hurricane Milton (hurricane), declared in October 2024.
Among 67 Florida counties, Indian River County ranks #17 for overall natural disaster risk.
Top Hazards
All 18 Hazard Risks
| Hurricane | Very High | 0.31 / yr | $132M |
| Lightning | High | 77.49 / yr | $1M |
| Wildfire | Low | 0.01 / yr | $863K |
| Strong Wind | High | 0.65 / yr | $1M |
| Riverine Flood | Medium | 0.50 / yr | $23M |
| Tornado | Medium | 0.31 / yr | $2M |
| Coastal Flood | Medium | 1.02 / yr | $835K |
| Heat Wave | Low | 1.96 / yr | $555K |
| Drought | Low | 22.99 / yr | $283K |
| Cold Wave | Low | 2.77 / yr | $530K |
| Earthquake | Very Low | 0.00 / yr | $78K |
| Landslide | Very Low | 0.05 / yr | $45 |
| Hail | Very Low | 1.19 / yr | $36K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Ice Storm | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
| Winter Weather | Very Low | 0.00 / yr | $0 |
Disaster History
Indian River County has received 35 federal disaster declarations since 1977, most recently Hurricane Milton in October 2024. Most frequent causes: Hurricane (22), Fire (5), Freezing (4).
| Declared | Type | Disaster |
|---|---|---|
| October 2024 | Hurricane | Hurricane Milton |
| October 2024 | Hurricane | Hurricane Milton |
| December 2022 | Hurricane | Hurricane Nicole |
| November 2022 | Tropical Storm | Tropical Storm Nicole |
| September 2022 | Hurricane | Hurricane Ian |
| September 2022 | Hurricane | Tropical Storm Ian |
| August 2020 | Hurricane | Hurricane Isaias |
| March 2020 | Biological | Covid-19 Pandemic |
| March 2020 | Biological | Covid-19 |
| October 2019 | Hurricane | Hurricane Dorian |
Showing the 10 most recent of 35 declarations.
Source: FEMA Disaster Declarations Summaries (OpenFEMA).
Frequently Asked Questions
What is the overall natural disaster risk for Indian River County?
Indian River County has a composite FEMA National Risk Index score of 95.6 out of 100, placing it in the High category and the 96th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Indian River County?
The three highest-rated hazards are Hurricane (Very High, $132M EAL), Lightning (High, $1M EAL), Wildfire (Low, $863K EAL). These account for most of the county's expected annual losses.
How does Indian River County compare to other Florida counties?
Indian River County ranks #17 of 67 Florida counties for overall natural disaster risk, with a high rating.
How many federally declared disasters has Indian River County had?
FEMA records 35 federal disaster declarations for Indian River County since 1977, most often 22 for hurricane events and 5 for fire events. The most recent was Hurricane Milton, declared in October 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. Indian River County's $163M EAL is a statistical average, not a guarantee for any specific year or address.