This event is no longer active — it's kept here as a record. Recovery may still be underway; the guidance below applies.
Part of: Bartholomew County Area Flooding — August 2026 →
Flood Warning issued August 1 at 4:50PM CDT until August 2 at 7:00AM CDT by NWS Chicago IL
This is a severe-significance flood warning event affecting Cook, IL; Lake, IN, tracked from official feeds (NOAA / National Weather Service). We update this page as the situation develops.
- Type
- Flood Warning
- Extent
- ≈ 23,540 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 (Cook, IL; Lake, IN), 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
Cook, IL; Lake, IN · ≈ 37 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.
- Storm report NWS LOT storm report
FLOOD — 2 NW Rockdale, IL
Video shared on social media shows a 2 to 3 inches of standing water on roadway.
- Storm report NWS LOT storm report
FLOOD — 2 WSW Crest Hill, IL
Picture shared on social media of 1-2 inches of standing water on roadway.
- News ABC7 Chicago
Chicago weather, today: Heavy rain Saturday with Cook, DuPage, Kendall, Will counties under Flash Flood Warning
- Bulletin NWS Chicago IL
Flood Warning issued
Cook, IL; Lake, IN
Show 3 earlier updates
- NBC 5 Chicago News
Flood watches, warnings in effect amid heavy rains in Chicago area
- cbsnews.com News
Delay issued for day 3 of Chicago's Lollapalooza due to storms, flood warning
- NWS LOT storm report Storm report
Updates are captured automatically from official and news sources, and may lag the live source. For the very latest, see NOAA / National Weather Service ↗.