Marengo County, Alabama

What hazards hit Marengo County most?

The most frequent records are severe thunderstorm wind events: 120 since 1967. The rank column places the county among Alabama's counties by days with a record per 1,000 square miles of land over each hazard's complete period.

Source: NOAA NCEI Storm Events Database (county and forecast-zone records attributed to the county; a zone record shows its own totals on each county it covers). Days: dates with at least one record of the hazard in the county. Ranks: days with a record per 1,000 square miles of land (Census Bureau 2024 Gazetteer), since 1950 for tornadoes, 1955 for hail and thunderstorm wind, 1996 for the rest.

How many tornadoes has Marengo County had?

NOAA records 50 tornadoes in Marengo County from 1961 to 2026, the strongest rated EF3, with 2 deaths and 16 injuries recorded in the county. A tornado that crossed a county line is counted in each county it touched, with the length of its path inside the county.

Counted as whole tornadoes rather than county records, the Storm Prediction Center's database holds 47 tornadoes whose track touched Marengo County since 1950 (NOAA's county records number 50: they file a crossing tornado once per county segment, and the two databases differ on some tracks); along their whole tracks they killed 9 people, 2 of them in Marengo County.

Map of the strongest tornado tracks in Alabama.

Source: NOAA NCEI Storm Events Database, tornado records by county (path length in the county, maximum width); ratings as published: F scale before February 1, 2007, EF scale after. Whole-track figures: NOAA Storm Prediction Center tornado database (1950-2025). SPC severe weather database.

When was the last damaging storm in Marengo County?

The most recent record with damage, injuries or deaths is the February 6, 2020 tornado (1 death and 1 injury).

National Weather Service meteorologists surveyed damage in northern Marengo County and determined that it was consistent with an EF1 tornado, with maximum winds near 110 mph. The tornado touched down southeast of Demopolis, west of U.S. Highway 43. The tornado tracked northeast and produced damage near Starmont Lane and Orchard Drive. Several trees were uprooted or were snapped off. Two homes suffered minor damage. The most concentrated damage occurred at U.S. Highway 43 near County Road 54. This is the location where two manufactured homes were destroyed and two homes were damaged. The one injury and the one fatality occurred in the manufactured home that was totally destroyed. Several trees were blown down in this location as well. The tornado continued across U.S. Highway 43 where it destroyed a barn and uprooted many more trees. The tornado then lifted before it crossed French Creek.
National Weather Service event narrative, NOAA Storm Events Database (search the full record, event 878237)

Source: NOAA NCEI Storm Events Database; every record of 2025-2026 is listed, earlier ones when they caused deaths, injuries or $250,000 of damage (2025 dollars), and every tornado.

The deadliest and costliest records

A damage figure marked "step" is a record from before 1993: NOAA then filed damage by category, and the figure is the category as entered, in the dollars of that year, not an estimate of the loss.

Source: NOAA NCEI Storm Events Database: deaths and injuries direct and indirect; damage is property plus crops as estimated by the National Weather Service, converted to 2025 dollars.

Is it getting more frequent?

Records per decade for Marengo County's most frequent hazards. Counts rose everywhere after 1996, when NOAA began recording every event type, so compare decades within a hazard's complete period only (the shaded cells come before it).

Drought in the 2020-26: 16 records against 5 in the decade before, 16 of them forecast-zone records. Cells marked z rose mostly through zone records. The local National Weather Service office files these once per forecast zone, so a change in how it draws its zones or splits a storm into records moves this count as much as the weather does; read it beside the Marengo County days with a record above.

Source: NOAA NCEI Storm Events Database, records per calendar decade; zone records from the CZ_TYPE field (Z).

What time of year?

Records by month in Marengo County. The two busiest months are in violet.

Source: NOAA NCEI Storm Events Database, records by the month they began.

Federal disaster declarations for Marengo County

FEMA's register lists 20 declarations that include Marengo County: 10 major disasters, 10 emergencies and 0 fire management assistance declarations. Most were for hurricane (11) and severe storm (4).

Source: FEMA OpenFEMA Disaster Declarations Summaries (v2), declarations through October 2, 2026; one declaration is counted once however many areas it names. OpenFEMA dataset page.

How many floods has Marengo County had?

NOAA's Storm Events Database holds 14 flood or flash flood records for Marengo County from 1998 to 2026, on 14 days, with 0 deaths. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), Marengo County ranks 1766th of 2,942 U.S. counties.

The National Flood Insurance Program has paid $187,000 on 40 claims filed in Marengo County; the most in one year was 12 in 1991. Claims count insured losses only: uninsured flood damage is not in this file.

Source: FEMA OpenFEMA NFIP Redacted Claims, as of September 8, 2026; claims by year of loss, payments in the dollars of the year paid. OpenFEMA dataset page.

FEMA's modeled risk for Marengo County

FEMA's National Risk Index rates Marengo County Relatively Low overall, with an expected annual loss of $10.4 million. These are FEMA's model estimates of future loss from 18 hazards, not a count of what happened; they can differ from the record above.

Source: FEMA National Risk Index, county table, December 2025 release. FEMA's National Risk Index map.

Counties that share a border with Marengo County

1. Clarke County 612
2. Dallas County 453
3. Sumter County 416
4. Choctaw County 356
5. Marengo County 337
6. Hale County 333
7. Greene County 246
8. Perry County 240
9. Wilcox County 169

Source: U.S. Census Bureau county adjacency file; NOAA NCEI Storm Events Database, records since 1950. The Census Bureau's adjacency file.

Next

• Tornadoes in AlabamaEvery Alabama tornado since 1950 and the counties with the most per square mile
• Severe thunderstorm wind in AlabamaThe state's severe thunderstorm wind events, by county, year and month
• The Alabama recordEvery hazard in the state, its deadliest events and its federal declarations
• FEMA's risk rating for each hazard in Marengo CountyThe hazard risk calculator: 18 hazards beside the county's record
• Download Marengo County's FEMA declarations (CSV)20 rows: every declaration that named the county, for your own analysis