A Flash Flood Warning is active right now for the Washington, Pennsylvania area, issued by the National Weather Service office in Pittsburgh at 11:42 AM EDT on Sunday, September 20, 2026, and running until 1:30 PM EDT. Flash flooding is already occurring across the warned area after 1.5 to 2.5 inches of rain fell this morning — the exact kind of sudden interior water-intrusion event that turns into restoration work within hours. This is a live snapshot as of 11:50 AM EDT Sunday, September 20, 2026. Conditions change fast — always verify with the National Weather Service for your specific county or ZIP code.
Washington, PA — Flash Flood Warning
Issuing office: NWS Pittsburgh, PA
Issued: 11:42 AM EDT, Sunday September 20, 2026
Expires: 1:30 PM EDT, Sunday September 20, 2026
Severity: Severe | Certainty: Likely | Urgency: Immediate
Per the National Weather Service: at 11:42 AM EDT, Doppler radar indicated that rain was ending across the warned area. Earlier, emergency management reported several instances of flash flooding across the warned area. Between 1.5 and 2.5 inches of rain have fallen. Additional rainfall amounts up to 1.0 inch are possible in the warned area. Flash flooding is already occurring.
Hazard: Flash flooding caused by heavy rain.
Source: Emergency management 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 that will experience flash flooding include: Washington, Canonsburg, Avella, Wolfdale, McGovern, Bentleyville, East Washington, New Eagle, Baidland, Houston, Ellsworth, Claysville, Deemston, Eighty Four, Cokeburg, Hickory, Beallsville and West Alexander.
Sources: the NWS alert for this warning and the NWS Pittsburgh office page.
Stay safe this afternoon
Turn around, don’t drown when encountering flooded roads. Most flood deaths occur in vehicles — never drive through flooded roadways, and never drive around barricades. Six inches of fast-moving water can knock a person down; twelve inches can sweep a car away.
If water enters the home: stay out of standing water where electricity may be present, and avoid the basement until water recedes and the power is confirmed off. Photograph everything before cleanup — documentation matters for insurance claims. Then call a local restoration contractor. Water left sitting starts a second wave of damage within a day, and flash-flood water can carry contaminants that make it more than a simple dry-out.
What this means for restoration teams
This is the signature pattern for flash-flood water-intrusion calls: 1.5 to 2.5 inches of rain in a short window across small municipalities with creeks, low-lying streets, and older housing stock. Expect the call types that dominate this work — saturated carpet and padding, wicking drywall, soaked insulation, and sewage backup in low-lying areas where stormwater overwhelmed drains.
The play: stage equipment now, not after the calls start. Pre-position drying assets, air movers, and dehumidifiers for dispatch across Washington and the surrounding towns. Keep an on-call rotation through the afternoon and into the evening — this warning expires at 1:30 PM EDT, but the damage discovery window runs for days. On the first call, capture the address, the water source (overland flow, creek, street backup, foundation seepage), and the affected areas before rolling a truck.
Field discipline: photo-document everything before mitigation begins. Moisture-map every affected room, not just the visibly wet one — flash-flood events push water through wall cavities and under flooring in ways that don’t show on the surface. Keep the homeowner’s payment responsibility clear in writing before work starts, and flag potential coverage questions early: flood-sourced water intrusion often lands on a different coverage track than a burst pipe.
Mold risk begins within 24–48 hours of saturation, so the jobs dispatched today set the shape of next week’s backlog.
FEMA & federal assistance
FEMA Helpline: 1-800-621-3362 (7 a.m.–10 p.m. local time, 7 days a week). Apply at DisasterAssistance.gov, through the FEMA app, or find recovery centers 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 is safe to do so.
Looking ahead
This warning expires at 1:30 PM EDT today. Rain was ending across the warned area as of the 11:42 AM update, but up to an additional inch of rain remains possible, and creeks and streams can crest after the rain stops — low-lying areas should stay alert through the afternoon. The next NWS update will land if conditions warrant, and any new or extended warning will be picked up in Storm Tracker coverage.
Demand window note: water-intrusion calls typically start within hours of water receding and keep coming for days as homeowners discover damage — soaked flooring discovered that evening, wicking drywall the next morning, musty odors by midweek. Contractors in the Washington, PA area should expect a call curve that peaks over the next 24–72 hours.
Sources & how to verify
To verify for your own county or ZIP code, check weather.gov or 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.
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