Coahoma County, Mississippi: Natural Disaster Risk and History
Coahoma County, Mississippi has a Relatively Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 62.5 out of 100, higher than about 62% of US counties, with earthquakes, tornadoes and drought scoring highest of its 18 hazards and $15 million a year in expected losses.
OpenFEMA lists 21 federal disaster declarations that included Coahoma County since 1973, 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 23 tornadoes touching Coahoma County from 1950 to 2025.
Live weather alerts for Mississippi All official warnings Latest FEMA declarations
Population 21,300 Buildings worth $4.4 billion Area 589 sq mi Risk rank in Mississippi 28 of 82 FIPS 28027
All 18 hazards, highest risk first
FEMA National Risk Index| Hazard | Risk rating | Score | Expected loss a year | How often | Events in record |
|---|---|---|---|---|---|
| Earthquake | Relatively Moderate | 90.7 | $3.8 million | about once every 210 years | — |
| Tornado | Relatively Moderate | 86.6 | $3.7 million | about once every 2.9 years | 19 |
| Drought | Relatively Moderate | 80.1 | $615,471 | about 12 a year | 385 |
| Heat wave | Relatively Low | 78.3 | $907,844 | about 23 a year | 373 |
| Strong wind | Relatively Moderate | 76.3 | $758,031 | about 1.6 a year | 62 |
| Hail | Relatively Low | 63.8 | $283,688 | about 2.6 a year | 99 |
| Hurricane | Relatively Low | 59.7 | $130,557 | about once every 33 years | 6 |
| Cold wave | Relatively Low | 49.0 | $597,938 | about 1.2 a year | 22 |
| Lightning | Relatively Low | 47.1 | $138,046 | about 62 a year | 102,080 strikes |
| Inland flooding | Relatively Low | 46.3 | $3.9 million | about once every 1.2 years | 23 |
| Ice storm | Relatively Low | 42.1 | $38,848 | about once every 1.4 years | 47 |
| Landslide | Very Low | 27.6 | $164 | about once every 5.7 years | — |
| Winter weather | Very Low | 20.7 | $12,018 | about 4.3 a year | 82 |
| Wildfire | Very Low | 10.5 | $2,165 | rarer than once in 1,000 years | — |
| 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 21
Most common: Severe Storm 10, Hurricane 4, Flood 4, Winter Storm 2.
| Decade | Declarations | Incident types |
|---|---|---|
| 1970s | 2 | Tornado, Severe Storm |
| 1990s | 4 | Severe Storm ×3, Flood |
| 2000s | 4 | Hurricane ×2, Severe Storm ×2 |
| 2010s | 6 | Severe Storm ×3, Flood ×3 |
| 2020s | 5 | Winter Storm ×2, Hurricane ×2, Severe Storm |
The last 10
Widest declarations that included Coahoma 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 Gustav (2008), Hurricane Katrina (2005).
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 23
| Tornadoes touching the county | 23 |
|---|---|
| Strongest-rated | (E)F3 ×3 |
| Peak month | April (7) |
| Deadliest | 29 Apr 1963, F3, 5.7 mi path, 5 killed, 10 injured |
| Longest path | 23 Dec 2015, EF3, 61.6 mi path, 2 killed, 28 injured |
| Most recent | 23 Dec 2015, EF3, 61.6 mi path, 2 killed, 28 injured |
| Deaths / injuries on those paths | 9 / 68 |
| Rating | (E)F0 | (E)F1 | (E)F2 | (E)F3 | (E)F4 | (E)F5 | Unrated |
|---|---|---|---|---|---|---|---|
| Count | 2 | 13 | 5 | 3 | 0 | 0 | 0 |
| Decade | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
|---|---|---|---|---|---|---|---|---|
| Count | 4 | 3 | 6 | 4 | 2 | 2 | 2 | 0 |
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 Coahoma County compares with its 5 nearest counties
| County | Distance | Overall risk | Score | Top hazard |
|---|---|---|---|---|
| Coahoma County (this page) | — | Relatively Low | 62.5 | Earthquake |
| Quitman County | 29 km | Very Low | 18.5 | Drought |
| Phillips County, AR | 32 km | Relatively Low | 61.7 | Earthquake |
| Tallahatchie County | 50 km | Very Low | 40.1 | Drought |
| Tunica County | 51 km | Very Low | 36.3 | Earthquake |
| Bolivar County | 55 km | Relatively Low | 76.8 | Earthquake |
Nearest by distance between county centres. Every county in Mississippi, ranked.
Vulnerability and resilience
| Social vulnerability | Very High 94.8 |
|---|---|
| Community resilience | Relatively High 74.5 |
| Community risk factor | 1.59 |
| Expected annual loss, all hazards | $15 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 Coahoma County's main hazards
- Right now: National Weather Service alerts for Mississippi · all official warnings on Global Incident Tracker.
- Earthquake: Earthquakes today · Earthquake safety guide
- Tornado: Is there a tornado warning now?
- Drought: Drought monitor for Mississippi
- 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 Coahoma County
What natural disasters is Coahoma County, Mississippi most at risk from?
Coahoma County, Mississippi has a Relatively Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 62.5 out of 100, higher than about 62% of US counties, with earthquakes, tornadoes and drought scoring highest of its 18 hazards and $15 million a year in expected losses.
How many federal disaster declarations has Coahoma County had?
OpenFEMA lists 21 federal disaster declarations that included Coahoma County since 1973, 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 Coahoma County?
NOAA's Storm Prediction Center recorded 23 tornadoes touching Coahoma County from 1950 to 2025. The deadliest: 29 Apr 1963, F3, 5.7 mi path, 5 killed, 10 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.