151
Recorded events
0
Direct deaths
0
Direct injuries
$14.5M
Property damage
Flood in Alexander County, Illinois: 151 recorded events between 2002 and 2025. The strongest on record measured 0. That places the county #24 nationally and #3 statewide for this hazard.
Decade by decade
Flood in Alexander County, Illinois: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flood in Alexander County is the 2010s, when 92 of the county's 151 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.
Within the Alexander County archive, flood makes up 44.9% of all recorded severe weather across 8 hazard types. Nationally the county sits at #24 for this hazard and #3 within Illinois, putting it in the 99.2 percentile of all U.S. counties.
Seasonality
Events by month
Apr is the peak month for flood in Alexander County with 27 recorded events, while Sep is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Mar 1, 2025 | CAIRO | 0 | $0 |
| Feb 17, 2025 | CAIRO | 0 | $0 |
| Jul 18, 2024 | THEBES | 0 | $0 |
| Jul 6, 2024 | THEBES | 0 | $0 |
| Jul 5, 2024 | EAST CAPE GIRARDEAU | 0 | $0 |
| May 10, 2024 | CAIRO | 0 | $0 |
| May 9, 2024 | THEBES | 0 | $0 |
| May 4, 2024 | THEBES | 0 | $0 |
| May 2, 2024 | EAST CAPE GIRARDEAU | 0 | $0 |
| Apr 1, 2023 | CAIRO | 0 | $0 |
Other hazards here
More from Alexander County
- Thunderstorm Wind 79
- Hail 52
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Major flooding continued on the Mississippi River from April. At the Thebes river gage, the flood crest of 45.52 feet on the night of May 2 was the second highest crest on record. The record crest was 45.91 feet in May of 1995. A major levee break at Fayville resulted in flash flooding in central and northern parts of the county. Communities outside of levee protection systems, such as Olive Branch, Miller City, and Tamms, were evacuated as floodwaters inundated entire communities and cut off access roads. Many homes and businesses in those communities were sandbagged, but most of them ended up being flooded. Lower portions of the community of Thebes were inundated. The National Guard was requested to assist with sandbagging residences. A water main break caused interruptions in the drinking water supply.
Numerous road closures were reported, though all major roads were reopened within 24 hours. U.S. Highway 51 was closed at the northern entrance to Cairo. Several homes were flooded, mainly in the Olive Branch and Gale areas. Basement flooding occurred in Cairo, especially north parts of the city. Ten people were rescued with three boats used by the Department of Natural Resources.
Major flooding of the Ohio River continued into January. At the Cairo river gage, the river crested at 56.14 feet on the 4th. This flood was very similar to the flood of March, 1997, when the crest was 56.2 feet. Flood stage there is 40 feet. The bridge connecting Cairo with Wickliffe, KY was closed due to floodwater over the bridge approach on the Kentucky side. The bridge, which carries U.S. Highway 51/60/62 over the Ohio River, was closed for about one week. Most of the flood gates were installed at Cairo. Areas not protected by the levee and floodwall system were inundated. Since the crop season was not underway, agricultural losses were insignificant.
Quick answers
Frequently asked
How many flood events are on record in Alexander County, Illinois?
151 flood events are recorded in Alexander County between 2002 and 2025, causing 0 direct deaths.
What is the strongest flood recorded in Alexander County?
The strongest flood on record in Alexander County measured 0.
Where does the flood data for Alexander County come from?
All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.
Cite this page
“Flood in Alexander County, Illinois.” Severe Weather History. severeweatherhistory.com/county/illinois/alexander-county/flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.