Simpson County, Mississippi: Natural Disaster Risk and History
Simpson County, Mississippi has a Relatively Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 51.0 out of 100, higher than about 51% of US counties, with hurricanes, hail and tornadoes scoring highest of its 18 hazards and $12 million a year in expected losses.
OpenFEMA lists 28 federal disaster declarations that included Simpson County since 1969, not counting 2 for COVID-19; the latest is DR-4899-MS (Severe Winter Storm, declared 6 February 2026). NOAA's Storm Prediction Center recorded 77 tornadoes touching Simpson County from 1950 to 2025.
Live weather alerts for Mississippi All official warnings Latest FEMA declarations
Population 25,913 Buildings worth $5.1 billion Area 596 sq mi Risk rank in Mississippi 41 of 82 FIPS 28127
All 18 hazards, highest risk first
FEMA National Risk Index| Hazard | Risk rating | Score | Expected loss a year | How often | Events in record |
|---|---|---|---|---|---|
| Hurricane | Relatively Low | 80.6 | $1.5 million | about once every 9.2 years | 31 |
| Hail | Relatively Moderate | 78.3 | $596,942 | about 4.8 a year | 181 |
| Tornado | Relatively Moderate | 76.7 | $2.5 million | about once every 1.1 years | 60 |
| Heat wave | Relatively Low | 71.4 | $724,261 | about 14 a year | 216 |
| Strong wind | Relatively Moderate | 62.8 | $588,245 | about 3.9 a year | 150 |
| Landslide | Relatively Low | 62.8 | $2,422 | about once every 2.0 years | — |
| Drought | Relatively Low | 57.7 | $181,462 | about 1 a year | 315 |
| Ice storm | Relatively Low | 55.8 | $82,045 | about 1.1 a year | 73 |
| Lightning | Relatively Low | 55.3 | $210,579 | about 75 a year | 113,747 strikes |
| Inland flooding | Relatively Low | 51.6 | $5.2 million | about once a year | 28 |
| Wildfire | Very Low | 48.1 | $31,682 | about once every 769 years | — |
| Cold wave | Relatively Low | 45.1 | $587,280 | about once every 1.3 years | 15 |
| Earthquake | Very Low | 44.0 | $145,630 | about once every 709 years | — |
| Winter weather | Relatively Low | 41.8 | $36,124 | about 2.2 a year | 41 |
| Avalanche | Not Applicable | — | — | — | — |
| Coastal flooding | Not Applicable | — | — | — | — |
| Tsunami | Not Applicable | — | — | — | — |
| Volcanic activity | Not Applicable | — | — | — | — |
Score: FEMA's percentile among US counties that face the hazard (higher = more risk). Expected loss: FEMA's modelled average yearly loss to buildings, people (as a statistical value) and crops. How often: FEMA's annualised frequency of the hazard in the county; for some hazards it counts event-days, so it is a rough guide, not a forecast. "Not Applicable" means FEMA does not model that hazard here.
Federal disaster declarations 28
Most common: Severe Storm 12, Hurricane 9, Winter Storm 2, Flood 2.
| Decade | Declarations | Incident types |
|---|---|---|
| 1960s | 1 | Hurricane |
| 1970s | 5 | Severe Storm ×3, Snowstorm, Flood |
| 1980s | 1 | Severe Storm |
| 1990s | 4 | Severe Storm ×2, Tornado, Flood |
| 2000s | 6 | Hurricane ×4, Severe Storm ×2 |
| 2010s | 3 | Severe Storm ×2, Hurricane |
| 2020s | 8 | Hurricane ×3, Winter Storm ×2, Severe Storm ×2, Severe Ice Storm |
The last 10
Widest declarations that included Simpson County
- Severe Winter Storm (2026, DR-4899-MS): 82 Mississippi counties designated.
- Severe Winter Storm (2026, EM-3640-MS): 82 Mississippi counties designated.
- Hurricane Ida (2021, DR-4626-MS): 82 Mississippi counties designated.
Named storms in its declarations: Hurricane Ida (2021), Hurricane Delta (2020), Hurricane Isaac (2012), Hurricane Gustav (2008), Hurricane Katrina (2005), Hurricane Dennis (2005), Hurricane Ivan (2004), Hurricane Camille (1969).
Not counted above: 2 COVID-19 ("Biological") declarations — in 2020 every US county was included. Mississippi also had 3 statewide declarations with no county list.
Tornado record since 1950 77
| Tornadoes touching the county | 77 |
|---|---|
| Strongest-rated | (E)F4 ×5 |
| Peak month | April (15) |
| Deadliest | 23 Jan 1969, F4, 117.8 mi path, 32 killed, 241 injured |
| Longest path | 21 Nov 1992, F4, 128 mi path, 12 killed, 122 injured |
| Most recent | 31 Mar 2025, EF1, 3.3 mi path |
| Deaths / injuries on those paths | 59 / 760 |
| Rating | (E)F0 | (E)F1 | (E)F2 | (E)F3 | (E)F4 | (E)F5 | Unrated |
|---|---|---|---|---|---|---|---|
| Count | 16 | 36 | 14 | 6 | 5 | 0 | 0 |
| Decade | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
|---|---|---|---|---|---|---|---|---|
| Count | 6 | 9 | 9 | 3 | 8 | 9 | 14 | 19 |
Deaths and injuries are for each tornado's whole path, which can run beyond this county. F-scale ratings before February 2007, Enhanced Fujita (EF) after.
How Simpson County compares with its 5 nearest counties
| County | Distance | Overall risk | Score | Top hazard |
|---|---|---|---|---|
| Simpson County (this page) | — | Relatively Low | 51.0 | Hurricane |
| Rankin County | 39 km | Relatively Moderate | 85.0 | Hail |
| Jefferson Davis County | 39 km | Very Low | 23.1 | Hurricane |
| Smith County | 41 km | Relatively Low | 47.2 | Hurricane |
| Lawrence County | 44 km | Very Low | 25.0 | Hurricane |
| Covington County | 47 km | Relatively Low | 50.8 | Hurricane |
Nearest by distance between county centres. Every county in Mississippi, ranked.
Vulnerability and resilience
| Social vulnerability | Relatively High 76.3 |
|---|---|
| Community resilience | Relatively Low 36.7 |
| Community risk factor | 1.40 |
| Expected annual loss, all hazards | $12 million |
FEMA scales expected losses up where social vulnerability is high (people who may find it harder to prepare, evacuate or recover) and down where community resilience is high. A factor above 1 raises the risk score. For social vulnerability a high rating is worse; for resilience a high rating is better.
Prepare for Simpson County's main hazards
- Right now: National Weather Service alerts for Mississippi · all official warnings on Global Incident Tracker.
- Hurricane: Is there a hurricane now? · Cyclone preparation
- Hail: Weather alerts for Mississippi
- Tornado: Is there a tornado warning now?
- Your property's flood zone: FEMA Flood Map Service Center ↗ — this page cannot tell you that.
- Official preparedness guidance: Ready.gov ↗ and your county emergency management office.
What this page shows, and what it misses
FEMA's National Risk Index rates a whole county against every other US county; it is a planning-level estimate for nationwide comparison, not a flood-zone map and not a substitute for a local risk assessment or the risk to one home. Declarations are presidential disaster, emergency and fire management declarations that named this county; state declarations and SBA or USDA designations are not included. Tornadoes are counted when the county is one of up to four listed on the track; 670 tornadoes that crossed a state line carry no county list in NOAA's file and are left out.
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties - v1.20.0 (December 2025). Retrieved from https://services.arcgis.com/XG15cJAlne2vxtgt/ArcGIS/rest/services/National_Risk_Index_Counties/FeatureServer/0/query on November 2, 2026, 1:20 PM EST. This product uses the Federal Emergency Management Agency’s National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Federal Emergency Management Agency (FEMA), OpenFEMA Dataset: Disaster Declarations Summaries - v2, retrieved from https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries on November 2, 2026, 1:21 PM EST. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Tornado records: NOAA/NWS Storm Prediction Center, Severe Weather Database, tornadoes 1950–2025 (https://www.spc.noaa.gov/wcm/data/1950-2025_actual_tornadoes.csv, downloaded 2 November 2026). Public domain; not endorsed by NOAA. Compiled by Global Incident Tracker.
Questions about Simpson County
What natural disasters is Simpson County, Mississippi most at risk from?
Simpson County, Mississippi has a Relatively Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 51.0 out of 100, higher than about 51% of US counties, with hurricanes, hail and tornadoes scoring highest of its 18 hazards and $12 million a year in expected losses.
How many federal disaster declarations has Simpson County had?
OpenFEMA lists 28 federal disaster declarations that included Simpson County since 1969, not counting 2 for COVID-19; the latest is DR-4899-MS (Severe Winter Storm, declared 6 February 2026). Another 3 Mississippi declarations were made statewide without a county list.
How many tornadoes have hit Simpson County?
NOAA's Storm Prediction Center recorded 77 tornadoes touching Simpson County from 1950 to 2025. The deadliest: 23 Jan 1969, F4, 117.8 mi path, 32 killed, 241 injured (deaths and injuries are for the whole path).
Is the National Risk Index a flood zone map?
No. The National Risk Index is a planning-level estimate for a whole county, built for nationwide comparison. It does not tell you the flood zone or the risk of a single property: for that, look up the address on FEMA's Flood Map Service Center (msc.fema.gov) and ask your local floodplain manager.