Allen County, Indiana Natural Disaster Risk
FEMA National Risk Index assessment · IN
MediumComposite Risk Score
National percentile: 91th
Allen County faces medium composite natural disaster risk (NRI Risk Index score 90.8, 91th national percentile), driven primarily by strong wind and tornado exposure. Expected annual loss across all 18 hazard types is $97M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Risk Overview
Allen County carries a medium composite natural disaster risk, with a National Risk Index score of 90.8 out of 100 — placing it in the 91st national percentile and near the national midpoint for natural-disaster risk. The score blends Expected Annual Loss, Social Vulnerability, and Community Resilience across all 18 FEMA hazard types.
The county's risk is driven primarily by strong wind (damaging straight-line winds outside of tornadoes and hurricanes) at High risk — $5M in expected annual loss and about 4.90 events per year; tornado (violently rotating columns of air capable of catastrophic local damage) at High risk — $21M in expected annual loss and about 0.42 events per year; and riverine flood (rivers and streams overflowing their banks after heavy rain or snowmelt) at High risk — $60M in expected annual loss and about 1.07 events per year. Across all hazards, FEMA estimates $97M in expected annual loss for a population of 385K.
Beyond physical exposure, Allen 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: Allen County has received 17 federal disaster declarations since 1978, including 7 for severe storm events and 3 for snowstorm events. The most recent was Severe Winter Storm (winter storm), declared in January 2026.
Among 92 Indiana counties, Allen County ranks #4 for overall natural disaster risk.
Top Hazards
All 18 Hazard Risks
| Strong Wind | High | 4.90 / yr | $5M |
| Tornado | High | 0.42 / yr | $21M |
| Riverine Flood | High | 1.07 / yr | $60M |
| Winter Weather | High | 10.68 / yr | $407K |
| Hail | Medium | 3.44 / yr | $2M |
| Earthquake | Low | 0.00 / yr | $3M |
| Lightning | High | 41.45 / yr | $911K |
| Cold Wave | Medium | 3.58 / yr | $4M |
| Ice Storm | Medium | 1.26 / yr | $326K |
| Heat Wave | Low | 4.95 / yr | $1M |
| Drought | Low | 1.06 / yr | $239K |
| Landslide | Very Low | 0.13 / yr | $2K |
| Hurricane | Very Low | 0.01 / yr | $43K |
| Wildfire | Very Low | 0.00 / yr | $25K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Disaster History
Allen County has received 17 federal disaster declarations since 1978, most recently Severe Winter Storm in January 2026. Most frequent causes: Severe Storm (7), Snowstorm (3), Flood (3).
| Declared | Type | Disaster |
|---|---|---|
| January 2026 | Winter Storm | Severe Winter Storm |
| April 2023 | Severe Storm | Severe Storms, Straight-Line Winds, and Tornadoes |
| April 2020 | Biological | Covid-19 Pandemic |
| March 2020 | Biological | Covid-19 |
| April 2014 | Severe Storm | Severe Winter Storm and Snowstorm |
| April 2009 | Severe Storm | Severe Storms, Tornadoes, and Flooding |
| January 2008 | Severe Storm | Severe Storms and Flooding |
| March 2007 | Snowstorm | Snow |
| September 2005 | Hurricane | Hurricane Katrina Evacuation |
| January 2005 | Severe Storm | Severe Winter Storms and Flooding |
Showing the 10 most recent of 17 declarations.
Source: FEMA Disaster Declarations Summaries (OpenFEMA).
Frequently Asked Questions
What is the overall natural disaster risk for Allen County?
Allen County has a composite FEMA National Risk Index score of 90.8 out of 100, placing it in the Medium category and the 91th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Allen County?
The three highest-rated hazards are Strong Wind (High, $5M EAL), Tornado (High, $21M EAL), Riverine Flood (High, $60M EAL). These account for most of the county's expected annual losses.
How does Allen County compare to other Indiana counties?
Allen County ranks #4 of 92 Indiana counties for overall natural disaster risk, with a medium rating.
How many federally declared disasters has Allen County had?
FEMA records 17 federal disaster declarations for Allen County since 1978, most often 7 for severe storm events and 3 for snowstorm events. The most recent was Severe Winter Storm, declared in January 2026.
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. Allen County's $97M EAL is a statistical average, not a guarantee for any specific year or address.