This is a live snapshot as of 3:47 AM PDT (5:47 AM CDT), September 20, 2026. Conditions change fast — always verify with the National Weather Service for your specific county or ZIP code.
The National Weather Service in Quad Cities has extended a Flash Flood Warning for seven east-central and southeastern Iowa counties — Cedar, Iowa, Johnson, Keokuk, Louisa, Muscatine, and Washington — until 8:15 AM CDT. This is an observed flash flood event: trained weather spotters have confirmed flooding on the ground in Kalona, with the English River out of its banks. For restoration contractors, this is the exact interior-flooding workload that fills a water crew’s week — saturated ground, rising streams, and homes taking water while families are still asleep.
The warning: Seven Iowa counties — Flash Flood Warning
Issuing office: NWS Quad Cities IA/IL (KDVN) · Issued: September 20 at 5:41 AM CDT · Expires: September 20 at 8:15 AM CDT · Status: Actual, severity Severe, urgency Immediate · Detection: OBSERVED (spotter-confirmed)
The warning covers Southern Cedar County in east central Iowa; Iowa, Johnson, and Muscatine counties in east central Iowa; Keokuk County in southeastern Iowa; northwestern Louisa County in southeastern Iowa; and Washington County in southeastern Iowa.
At 5:41 AM CDT, trained weather spotters reported flash flooding in Kalona. Between 2 and 4 inches of rain have fallen across portions of the warned area. Flash flooding is ongoing. Rain has tapered off to mainly light to at-times-moderate rain, with the heaviest rain having already occurred. Residents should be alert for rapid rises and flooding on area streams and creeks and along the English River.
Washington County deputies reported around a foot of water covering the intersection of 133rd Street and Nutmeg Street in Kalona due to the English River being out of its banks.
Hazard: Flash flooding caused by thunderstorms (spotter-reported). Impact: Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses, as well as other poor-drainage and low-lying areas.
Locations in the warning path: Iowa City, Muscatine, Washington, Tipton, Marengo, West Branch, Sigourney, Columbus Junction, Durant, Coralville, North Liberty, West Liberty, Williamsburg, Wilton, Kalona, Tiffin, Wellman, Lone Tree, and University Heights.
Highways affected: Interstate 80 in Iowa between mile markers 205 and 277, and Interstate 380 between mile markers 1 and 7.
Source: the live NWS alert is available here; NWS Quad Cities’ office page is at weather.gov/dvn.
Stay safe this morning
Turn around, don’t drown when encountering flooded roads. Most flood deaths occur in vehicles. The NWS stresses extra caution in the dark — it is harder to recognize the dangers of flooding before dawn — and urges everyone to be aware of their surroundings and never drive on flooded roads.
If water enters the home: stay out of standing water where electricity may be present, avoid the basement until water recedes and power is confirmed off, and photograph everything before cleanup — documentation matters for insurance. Then call a local restoration contractor. Water left sitting starts a second wave of damage within a day.
What this means for restoration teams
An observed overnight flash flood in eastern Iowa is a water-intrusion pipeline, not a one-morning event. Expect the call pattern to run: flooded basements and crawlspaces in Kalona and along the English River bottoms first, then saturated slabs and ground-floor rooms as homeowners discover damage through the morning. Saturated drywall and insulation that isn’t opened up and dried within 24 to 48 hours becomes a mold-risk job — and low-lying areas always carry a sewage-backup possibility in this kind of event.
The play for contractors in the seven-county warned area: stage equipment now, pre-position drying assets, and keep an on-call rotation through the morning. On the first call, capture the address, the water source (floodwater intrusion vs. interior source), and the affected areas — the answer shapes the entire job. Field discipline holds: photo-document before mitigation begins, moisture-map every affected room, and keep the homeowner’s payment responsibility clear in writing before work starts.
One more thing to watch: the English River cresting later in the day. Flash flood warnings expire, but rivers keep rising after the rain stops — the homes closest to the river may take water hours after this warning ends.
Local emergency contacts
Contact information for the individual county emergency management offices in the warned area could not be verified for this post, so no numbers are listed here. For authoritative local guidance, check your county’s emergency management page or the NWS Quad Cities office at weather.gov/dvn. Dial 911 for life-threatening emergencies.
FEMA & federal assistance
If your home is damaged, the FEMA Helpline is 1-800-621-3362 (7 a.m.–10 p.m. local time, 7 days a week). You can also apply through DisasterAssistance.gov, the FEMA mobile app, or find a recovery center at fema.gov/drc. Basic eligibility generally requires citizenship or qualified status, identity verification, proof of occupancy or ownership, and unmet needs not covered by insurance. Apply as soon as it’s safe to do so — don’t wait for a disaster declaration to gather your documentation.
Looking ahead
This warning runs until 8:15 AM CDT. When it expires, the immediate concern shifts from flash flooding to the English River and area streams, which can crest hours after the heaviest rain — the Kalona report of water over 133rd and Nutmeg shows the river is already high. NWS Quad Cities may extend or replace this warning depending on how creeks respond through the morning; watch their office page for updates.
The demand window for restoration work typically opens within hours of water receding and keeps coming for days as people discover damage. Contractors should treat the English River corridor — and the low-lying ground in Kalona, Columbus Junction, and the Iowa River towns — as the highest-probability call zones for the next 48 hours.
Sources & how to verify
- NWS alert: Flash Flood Warning issued September 20 at 5:41 AM CDT by NWS Quad Cities IA IL
- NWS Quad Cities office: weather.gov/dvn
To verify for your own county or ZIP code: enter your location at weather.gov or visit your local NWS office page.
This post is for informational purposes and is not an official weather warning. Always follow instructions from local authorities and the National Weather Service.




