This event is no longer active — it's kept here as a record. Recovery may still be underway; the guidance below applies.
Part of: Putnam County Area Flooding — August 2026 →
Flash Flood Warning issued August 15 at 9:23PM CDT until August 16 at 3:30AM CDT by NWS Quad Cities IA IL
This is a severe-significance flash flood warning event affecting Louisa, IA; Mercer, IL, tracked from official feeds (NOAA / National Weather Service). We update this page as the situation develops.
- Type
- Flash Flood Warning
- Extent
- ≈ 219,703 acres
- Began
- To end
Affected by this event? Open your area's damage guides below to reach a vetted local restoration pro, 24/7.
Affected area map
The shaded area is the affected-area perimeter reported for this event by NOAA / National Weather Service (Louisa, IA; Mercer, IL), colored by hazard type. Pan and zoom to explore the map; when more than one observation exists, use the slider below to step through how the reported area changed.
Interactive affected-area map
Louisa, IA; Mercer, IL · ≈ 340 sq mi reported extent · Enable JavaScript to explore the map.
Shown as reported by our sources — not an official product. For current advisories and the authoritative map, see NOAA / National Weather Service ↗.
Restoration help near this event
Tap your city for a vetted local pro on that service, answered 24/7. Where we don't have a nearby city page yet, the step-by-step guides cover what to do first.
Water damage restoration
What to do now
Mold remediation
What to do now
Latest updates
Official updates and news coverage for this event, newest first — National Weather Service products, local storm reports, incident updates and press headlines. Official items are verbatim government text; news headlines link out to the original outlet.
- Bulletin NWS Quad Cities IA IL
Flash Flood Warning issued
Louisa, IA; Mercer, IL
- News Audacy
Historic flooding prompts evacuations and water rescues in Indiana
- Storm report NWS ILX storm report
FLASH FLOOD — 4 N Smithfield, IL
Farm fields flooded near Put Creek.
- Storm report NWS DVN storm report
FLASH FLOOD — 4 WSW Fort Madison, IA
Roads closed due to water over the roadway from area creeks.
Show 6 earlier updates
- NWS ILX storm report Storm report
- NWS DVN storm report Storm report
- KCII Radio News
Southeast Iowa Rain Gauges Full After 24 Hours, Flood Watch Across the Region
- KCII Radio News
Flood Warning Issued for Louisa and Iowa Counties, and Flood Watch in Effect for Many Area Counties
- WRIC ABC 8News News
The weddings must go on: Louisa wedding venue continues repairs weeks after storm
- kwqc.com News
Updates are captured automatically from official and news sources, and may lag the live source. For the very latest, see NOAA / National Weather Service ↗.