Illinois flood warnings
There are no flood warnings in Illinois right now. The last one was issued on October 4, 2026.
Flooding is happening or expected soon, often along rivers or over wide areas, and may last for days.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
Active flood warnings in Illinois
None right now. Other active alerts in Illinois: none.
Flood Warnings in Illinois by year
Illinois averaged 302.1 flood warnings per year from 2016 to 2025, and has had 285 so far in 2026. The most recent was issued on October 4, 2026.
Counties with the most flood warnings
| County | 2016–2025 |
|---|---|
| Crawford County | 235 |
| Lawrence County | 233 |
| Wabash County | 207 |
| Rock Island County | 155 |
| Gallatin County | 151 |
| LaSalle County | 145 |
| White County | 141 |
| Pike County | 138 |
| Lake County | 134 |
| Clay County | 123 |
What a flood warning means
A flood warning is issued when flooding is occurring or imminent but develops more slowly than a flash flood. River flood warnings are tied to forecast points on a river or stream and include the expected crest and the flood stage, which tells you how high the water will rise compared with the level where damage begins.
More about flood warnings and the national map →
What to do
- Follow evacuation orders from local officials.
- Move valuables and vehicles to higher ground.
- Never drive through water covering a road; the road bed may be washed out.
More Illinois alerts
- Tornado Warnings
- Tornado Watches
- Severe Thunderstorm Warnings
- Flash Flood Warnings
- Flood Watches
- Winter Storm Warnings
- Winter Storm Watches
- Winter Weather Advisories
- Cold Weather Advisories
- Freeze Warnings
- Frost Advisories
- Heat Advisories
- Extreme Heat Warnings
- High Wind Warnings
- Wind Advisories
- Red Flag Warnings
- Dense Fog Advisories
- All Illinois alerts