STATUS: ACTIVE — FLASH FLOOD WARNING
Live snapshot as of 12:05 AM EDT Monday, September 21, 2026. This warning is in effect until 4:30 AM EDT Monday. Conditions change fast — always verify with the National Weather Service for your specific county or ZIP code.
The National Weather Service in Wilmington, Ohio has a flash flood warning in effect for southern Fairfield County, Hocking County, and southeastern Pickaway County, Ohio, until 4:30 AM EDT Monday. At 11:37 PM EDT, radar indicated thunderstorms producing heavy rain across the warned area — between half an inch and an inch and a half of rain had already fallen, with another half inch to inch possible, and flash flooding ongoing or expected to begin shortly. For restoration teams, this is the exact interior-flooding profile that fills the phones at dawn: creeks and streams out of their banks, urban drainage overwhelmed, water in basements and low-lying living spaces.
Southern Fairfield, Hocking, and Southeastern Pickaway Counties, Ohio — Flash Flood Warning
Issuing office: NWS Wilmington, OH
Issued: 11:37 PM EDT Sunday, September 20, 2026
Expires: 4:30 AM EDT Monday, September 21, 2026
Severity: Severe | Certainty: Likely | Urgency: Immediate
The NWS warning, verbatim: at 11:37 PM EDT, radar indicated thunderstorms producing heavy rain across the warned area. Between 0.5 and 1.5 inches of rain have fallen. Additional rainfall amounts of 0.5 to 1 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.
HAZARD: Flash flooding caused by thunderstorms.
SOURCE: Radar indicated.
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 that may experience flash flooding include: Logan, Hocking Hills State Park, Hide-A-Way Hills, Starr, Amanda, Laurelville, Murray City, Sugar Grove, Tarlton, Gibisonville, Enterprise, Lake Logan State Park, Rockbridge, Ilesboro, South Bloomingville, Hideaway Hills, Buena Vista in Hocking County, and Union Furnace.
NWS office: weather.gov/iln (NWS Wilmington).
Alert source: api.weather.gov — this warning.
Stay safe tonight
Turn around, don’t drown when encountering flooded roads. Most flood deaths occur in vehicles. Never drive through flooded roadways — it takes only a few inches of moving water to sweep a vehicle. Be especially cautious at night, when it is harder to recognize the dangers of flooding. 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, 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
Overnight flash flooding in the Hocking Hills corridor and the Pickaway/Fairfield lowlands is a water-mitigation classic: basement flooding, first-floor intrusion in low-lying neighborhoods, overwhelmed sump systems, and sewage backup where drainage systems surcharge. The rainfall totals here — up to 2.5 inches where the additional inch lands on saturated ground — are squarely in the range that produces interior water jobs, not just yard flooding. Hocking Hills State Park and Lake Logan State Park being in the warned area also means commercial exposure: park facilities, cabins, and campgrounds.
The play: stage extraction and drying equipment now and keep an on-call rotation through the morning — the demand window for flash-flood water intrusion starts within hours of water receding and keeps coming for days as people discover damage. On the first call, capture the address, the water source (rising creek vs. overwhelmed drainage vs. sump failure — the category determines the protocol), and the affected areas. Sewage backup calls need Category 3 handling from the first minute.
Field discipline: photo-document before mitigation; moisture-map every affected room, not just the visibly wet ones; keep the homeowner’s payment responsibility clear in writing before work starts. Mold risk clocks in at 24 to 48 hours — schedule the drying plan, not just the extraction.
FEMA & federal assistance
FEMA Helpline: 1-800-621-3362 (7 a.m. to 10 p.m. local time, 7 days a week). You can also apply at DisasterAssistance.gov, through the FEMA app, or find a recovery center at fema.gov/drc. Basic eligibility: U.S. 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. To report flash flooding, go to weather.gov/iln and submit your report via social media, when you can do so safely.
Looking ahead
This warning runs until 4:30 AM EDT Monday. Rivers and creeks in the Hocking River watershed can crest hours after the rain stops — water levels may keep rising even after the warning expires. Watch for additional thunderstorm rounds overnight; saturated ground means even modest additional rain can renew flooding. The restoration demand window here is days long: water-intrusion calls typically start within hours of water receding and keep coming as basements get checked, carpet pulled, and musty odors get noticed mid-week.
Sources & how to verify
- NWS alert: api.weather.gov — Flash Flood Warning, NWS Wilmington OH (read September 20, 2026)
- Issuing office: NWS Wilmington, weather.gov/iln
Verify for your own county or ZIP at weather.gov or the NWS Wilmington office page above.
This post is for informational purposes and is not an official weather warning. Always follow instructions from local authorities and the National Weather Service.
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