On September 2 and 3, 2026, more than three inches of rain fell across Buffalo — including 1.77 inches in a single hour at the airport, the second-highest one-hour total on record there. Hertel and Parkside flooded over, and the system that carries both storm runoff and sanitary waste couldn't keep up, so it backed up: many basements in North Buffalo, Kenmore, Amherst, Cheektowaga and West Seneca took more than two feet of water, and some of that water was not clean. The City logged 286 flood-related 311 cases by the following Monday and ran an emergency bulk pickup on September 7. If your basement took water, here's the honest version of what comes next: sewage-contaminated water changes the rules, so this page leads with what to throw out rather than what to dry.
This is the question that decides everything else, and a lot of Erie County basements got both. Clean water came in through a window well, a foundation crack, or over a low sill during the downpour. It's rainwater. 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 this storm that means it carried sanitary sewage — Buffalo's older neighborhoods are served by combined sewers that carry storm runoff and waste in the same pipe, and when a downpour exceeds what the system can move, the overflow goes into the rivers and, for some homes, backwards into the basement. If the water rose out of your floor drain, treat it as contaminated even if it looked clear.
For anything that soaked in backup water, EPA and CDC flood-cleanup guidance is the same and it's blunt: discard porous materials — carpet and padding, area rugs, upholstered furniture, mattresses, particleboard and pressed-wood furniture, cardboard boxes, and wet fiberglass or cellulose insulation. They can't be reliably cleaned all the way through, and drying them doesn't fix contamination. 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 silt.
Photograph every item before it goes to the curb. The City's emergency bulk collection ran on September 7; check buffalony.gov or call 311 for current collection guidance for flood debris before you pile anything up.
A basement that held two feet of water is not 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 the outside while you do it — September air in Western New York carries plenty of moisture of its own, so open windows work against you on a humid day. Pull anything off the floor that's still holding water: stair carpet, stored boxes, the bottom 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 going back over it too soon is the single most common way people end up doing this job twice.
You're past prevention and into detection, and that's still worth doing carefully. Mold can start on damp material within about 24 to 48 hours, so the useful question at day seven isn't whether anything started — it's what's still wet enough to keep going. Close the basement up for a few hours and then walk down: a musty smell that's stronger than it was on day one means trapped moisture. Check the bottom foot of finished walls, behind paneling, under the stair carpet, and inside the sill plate area where the joists meet the foundation. A $30 moisture meter tells you more right now than a test kit will, because the answer either way is to dry it. Our signs guide covers what's worth acting on, and our cost guide shows what fair prices look like when the job does need a pro.
If you rent, New York's warranty of habitability (Real Property Law § 235-b) requires landlords to keep the premises fit for human habitation and free of conditions dangerous to life, health or safety — sewage in a living space 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.
Sewage backup across a large area, water still standing, a finished basement that soaked through, 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.
Clean 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 clean 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.
North Buffalo got a near-record hour of rain, and homes that back up once in a combined-sewer neighborhood tend to back up 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 and any old footing-drain connections are sending roof water into the sanitary line, which makes your own backup more likely. Neither is glamorous and both are cheaper than doing this cleanup twice.
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. 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.
Sewer backup is usually its own coverage. A standard homeowners policy generally excludes both surface flooding and backup through drains; the add-on to look for on your declarations page is water backup and sump overflow, often a modest endorsement with its own lower limit. An NFIP flood policy covers backup only when flooding caused it. Check the policy by name rather than assuming, and call your agent early. On government help: as of this writing there was no federal major disaster declaration for this event. State and local officials were collecting damage reports, which can support an SBA disaster declaration — that route offers low-interest disaster loans to homeowners, renters and businesses rather than grants. Reporting your damage to Buffalo 311 or your town matters either way, because those reports are how the threshold gets met. Check DisasterAssistance.gov for current status. Your insurer makes the coverage call, not us.
Generally no. EPA and CDC flood-cleanup guidance is to discard porous items that soaked in water contaminated with sewage — carpet and padding, upholstered furniture, mattresses, particleboard, and wet insulation. Hard, non-porous surfaces like concrete, tile, metal and solid wood can be cleaned, disinfected and dried, and are usually fine to keep. This is the one situation where drying alone isn't the answer.
You're past prevention and into finding it. Mold can start on damp material within about 24 to 48 hours, so at day seven the useful question is what's still wet. Check behind paneling and finished basement walls, under stair carpet, and along the bottom foot of drywall. A musty smell that gets stronger when the basement is closed up means moisture is still trapped somewhere. Keep a dehumidifier running until readings actually come down, not just for a day.
Usually only if you carry the water backup and sump overflow endorsement, which is an add-on rather than part of a standard policy. A standard homeowners policy typically excludes both surface flooding and sewer backup, and an NFIP flood policy covers backup only when flooding caused it. Check your declarations page for backup coverage by name and call your agent early — your insurer makes the coverage call, not us.
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