DeKalb County, Alabama Natural Disaster Risk
FEMA National Risk Index assessment · AL
LowComposite Risk Score
National percentile: 80th
DeKalb County faces low composite natural disaster risk (NRI Risk Index score 80.4, 80th national percentile), driven primarily by strong wind and tornado exposure. Expected annual loss across all 18 hazard types is $32M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Risk Overview
Overall natural disaster risk in DeKalb County is low, with a National Risk Index score of 80.4 out of 100 — placing it in the 80th national percentile and below the national average for natural-disaster risk. The score blends Expected Annual Loss, Social Vulnerability, and Community Resilience across all 18 FEMA hazard types.
Risk here concentrates in strong wind (damaging straight-line winds outside of tornadoes and hurricanes) at High risk — $2M in expected annual loss and about 4.68 events per year; tornado (violently rotating columns of air capable of catastrophic local damage) at Medium risk — $5M in expected annual loss and about 0.70 events per year; and cold wave (prolonged spells of dangerously low temperatures) at Medium risk — $4M in expected annual loss and about 1.47 events per year. Across all hazards, FEMA estimates $32M in expected annual loss for a population of 71K.
Beyond physical exposure, DeKalb County has a high social vulnerability rating (how susceptible the population is to harm) and a very low community resilience rating (its capacity to prepare for and recover from disasters). That combination — a more vulnerable population with limited resilience — can amplify the human cost of any given event.
The county's disaster history tells the same story: DeKalb County has received 34 federal disaster declarations since 1973, including 18 for severe storm events and 7 for hurricane events. The most recent was Hurricane Helene (hurricane), declared in September 2024.
Among 67 Alabama counties, DeKalb County ranks #21 for overall natural disaster risk.
Top Hazards
All 18 Hazard Risks
| Strong Wind | High | 4.68 / yr | $2M |
| Tornado | Medium | 0.70 / yr | $5M |
| Cold Wave | Medium | 1.47 / yr | $4M |
| Drought | Medium | 30.43 / yr | $1M |
| Landslide | Low | 0.61 / yr | $29K |
| Earthquake | Low | 0.00 / yr | $2M |
| Riverine Flood | Medium | 1.71 / yr | $16M |
| Winter Weather | Medium | 4.84 / yr | $136K |
| Wildfire | Low | 0.00 / yr | $170K |
| Lightning | Medium | 61.22 / yr | $408K |
| Hurricane | Low | 0.03 / yr | $420K |
| Ice Storm | Medium | 0.70 / yr | $125K |
| Heat Wave | Low | 4.00 / yr | $516K |
| Hail | Low | 4.77 / yr | $239K |
| 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
DeKalb County has received 34 federal disaster declarations since 1973, most recently Hurricane Helene in September 2024. Most frequent causes: Severe Storm (18), Hurricane (7), Flood (3).
| Declared | Type | Disaster |
|---|---|---|
| September 2024 | Hurricane | Hurricane Helene |
| September 2020 | Hurricane | Hurricane Sally |
| July 2020 | Severe Storm | Severe Thunderstorms |
| March 2020 | Biological | Covid-19 Pandemic |
| March 2020 | Biological | Covid-19 |
| April 2019 | Severe Storm | Severe Storms, Straight-Line Winds, Tornadoes, and Flooding |
| September 2017 | Hurricane | Hurricane Irma |
| January 2016 | Severe Storm | Severe Storms, Tornadoes, Straight-Line Winds, and Flooding |
| May 2014 | Severe Storm | Severe Storms, Tornadoes, Straight-Line Winds, and Flooding |
| April 2011 | Severe Storm | Severe Storms, Tornadoes, Straight-Line Winds, and Flooding |
Showing the 10 most recent of 34 declarations.
Source: FEMA Disaster Declarations Summaries (OpenFEMA).
Frequently Asked Questions
What is the overall natural disaster risk for DeKalb County?
DeKalb County has a composite FEMA National Risk Index score of 80.4 out of 100, placing it in the Low category and the 80th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in DeKalb County?
The three highest-rated hazards are Strong Wind (High, $2M EAL), Tornado (Medium, $5M EAL), Cold Wave (Medium, $4M EAL). These account for most of the county's expected annual losses.
How does DeKalb County compare to other Alabama counties?
DeKalb County ranks #21 of 67 Alabama counties for overall natural disaster risk, with a low rating.
How many federally declared disasters has DeKalb County had?
FEMA records 34 federal disaster declarations for DeKalb County since 1973, most often 18 for severe storm events and 7 for hurricane events. The most recent was Hurricane Helene, declared in September 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. DeKalb County's $32M EAL is a statistical average, not a guarantee for any specific year or address.