The Pittsburgh area took two rounds of flooding in the first ten days of September 2026. On September 3, more than two inches of rain fell on the city — a record for the date — and fire and EMS crews rescued dozens of stranded drivers while some municipalities, including Oakmont and North Huntingdon, declared local emergencies. Then, the night of September 9, another line of storms put flash flood warnings over Pittsburgh, Bethel Park, Monroeville and the northern suburbs, with vehicles submerged in McCandless. If water got into your house in either round — through a window well, down a hillside, or up a floor drain — here's the honest version of what comes next: most of what matters this week is drying and sorting, and much of it you can do yourself.
Pittsburgh floods in two different ways, and they call for different cleanups. Surface water — rain running off a hillside, through a window well, over a low sill, or seeping through a stone or block foundation — is rainwater, sometimes carrying mud. You dry it, and most of what got wet can be saved. Backup water came up through the floor drain, the laundry standpipe, or the toilet — and in much of the older Pittsburgh area, storm runoff and sanitary waste share the same combined sewer pipe, so when a downpour exceeds what the system can move, some of the overflow goes backwards into basements. If the water rose out of your floor drain, treat it as contaminated even if it looked clear.
A basement that got wet on September 3, mostly dried, and then got wet again on the 9th has effectively been damp for a week — and mold can get started on damp material within about 24 to 48 hours. That doesn't mean remediation; it means the sorting question shifts from "what got wet" to "what stayed wet." Porous material that never fully dried between rounds — carpet pad, cardboard boxes, the bottom edge of drywall, insulation in a below-grade wall — is where problems start. A $30 moisture meter settles arguments a nose can't: check the bottom foot of finished walls, the sill-plate area where joists meet the foundation, and anything sitting on the floor. Hillside lots have one more Pittsburgh-specific wrinkle: groundwater keeps seeping through foundation walls for days after the rain stops, so a wall that reads wet on Saturday isn't necessarily a wall that failed — it may just be a hillside still draining. Keep the dehumidifier running until readings come down and stay down.
For anything that soaked in backup water, EPA and CDC flood-cleanup guidance is blunt: discard porous materials — carpet and padding, area rugs, upholstered furniture, mattresses, particleboard and pressed-wood furniture, cardboard, and wet fiberglass or cellulose insulation. They can't be reliably cleaned all the way through. Keep and clean hard, non-porous materials — concrete floors and block walls, tile, metal shelving, plastic bins, solid wood, appliances (have anything with a motor or gas connection checked before you run it). Drywall and paneling that got wet come out to about a foot above the water line so the cavity behind can dry. Wash hard surfaces with detergent and water first, then disinfect, then dry — in that order, because disinfectant doesn't do much through a layer of river silt. For surface water, the discard list shrinks a lot: dry what you can dry fully within a couple of days, and photograph anything you do throw out before it goes to the curb.
A basement isn't dry because the floor looks dry. Get air moving across the walls and floor, run a dehumidifier continuously and empty it or plumb it to the drain, and keep the basement closed off from outside air while you do it — September air in Western Pennsylvania carries plenty of moisture of its own, so open windows work against you on a humid day. Pull everything off the floor that's still holding water: stair carpet, stored boxes, the bottom shelf of a workbench. If you have a finished basement, the framing and insulation behind the finish is where the water is now; if the drywall was wet, it comes off low so the cavity can dry, and closing it back up too soon is the single most common way people end up doing this job twice.
Sewage backup across a large area, water still standing, a finished basement that soaked through twice, or water that reached the furnace, water heater or electrical panel. Contaminated water over a big footprint is the case where professional cleanup is worth it.
Surface water, removed, drying underway. Watch for musty smells and damp spots over the next two weeks, and test only if a question remains.
A few inches of rainwater on a concrete floor, dried within a day or two, nothing porous involved. Keep it dry and ventilated — you very likely don't need to spend a dime.
If you rent, Pennsylvania courts recognize an implied warranty of habitability in every residential lease — the landlord must keep the home fit to live in, and serious water intrusion, sewage, and the dampness that follows are generally the owner's to address once they have notice. Put the notice in writing today, keep dated photos, and keep copies of everything. Your own belongings are typically your responsibility, and renters insurance may help. Our renters guide covers how to write the notice and what happens next.
After a flood that makes the news, door-knockers follow. Some are fine; some are not. The honest rule: no reputable company needs you to sign tonight. Read anything that assigns your insurance benefits to a contractor, and don't sign it on your porch. Ask to see the moisture readings behind any big quote — a fair contractor will show you the meter. Get the debris out, take your photos, and compare at least two quotes for anything over a few hundred dollars. Our cost guide shows what this work typically costs, so you can spot a scare-quote when you see one.
It depends on the water's path, and the policy language is unforgiving. A standard homeowners policy generally excludes surface flooding; water that backed up through a drain is usually covered only if you carry the water backup and sump overflow endorsement, an add-on with its own lower limit. An NFIP flood policy covers backup only when flooding caused it. Check your declarations page by name rather than assuming, and call your agent early. On government help: as of this writing there is no federal disaster declaration for the September 2026 Pittsburgh-area storms. Some municipalities declared local emergencies, which helps them mobilize but does not by itself create FEMA assistance for homeowners. Report your damage to your municipality or through Allegheny County's channels either way — damage reports are how state and federal thresholds get met — and check DisasterAssistance.gov for current status. Your insurer makes the coverage call, not us.
Homes that flood once in a valley neighborhood or on a hillside lot tend to flood again. Once things are dry, two questions are worth asking a plumber: whether a backwater valve on your sewer lateral makes sense for your house, and whether your downspouts are dumping roof water next to the foundation instead of well away from it. If your street flooded from a creek or culvert, ask your municipality what its stormwater plan says about it. None of this is glamorous and all of it is cheaper than doing this cleanup twice.
Yes. Material that got wet on September 3 and again the night of September 9 has been damp for most of a week, which is well past the 24-to-48-hour window in which mold can get started. Treat anything porous that stayed wet through both rounds — carpet pad, cardboard, the bottom edge of drywall — as suspect, check it with a moisture meter rather than by touch, and don't close walls back up until readings actually come down.
Yes. Water that rose out of a floor drain, standpipe or toilet likely carried sanitary sewage, because much of the older Pittsburgh area is served by combined sewers that carry storm runoff and waste in the same pipe. EPA and CDC guidance for contaminated water is to discard porous items that soaked — carpet and padding, upholstered furniture, mattresses, particleboard, wet insulation — and to clean, disinfect and then dry hard surfaces like concrete, tile, metal and solid wood.
A standard homeowners policy generally excludes surface flooding, and covers sewer backup only if you carry the water backup and sump overflow endorsement. An NFIP flood policy covers backup only when flooding caused it. There is no federal disaster declaration for these storms as of this writing — municipal emergency declarations don't by themselves create FEMA assistance. Report your damage to your municipality either way, and check your policy by name with your agent — your insurer makes the coverage call, not us.
Get an honest read before you spend anything. The free Mold and Water Advisor will tell you what's a dry-it-yourself situation and what isn't.
✨ Ask the Mold and Water Advisor — free