Water creeping across your floors, seeping into walls, swallowing your belongings. A house was flooded moment hits hard and fast. It’s a gut-punch that leaves even the most level-headed homeowner standing paralysed in ankle-deep water, not knowing where to begin.
You’re not alone. Approximately 7% of Australian addresses carry some level of flood risk, and when the water comes, it doesn’t send a courtesy notice.
This guide gives you the exact steps to take when there’s a flood inside the house. No fluff. No theory. Just the emergency sequence that protects your family, salvages your property, and starts the recovery clock properly.
The first 60 minutes shape everything that follows. When a flood emergency hits, your brain will scream fifty instructions at once. Pause. Breathe. Follow this sequence.
Step one: Secure the people. Move everyone to the highest dry point in the home. If water is rising rapidly, exit entirely and head for higher ground. Possessions are replaceable. People aren’t.
Step two: Kill the power, but not recklessly. If your switchboard is dry and safely accessible, turn off the main switch, all circuit breakers, and individual fuses. If the switchboard is wet, or you’d need to stand in water to reach it, do not touch it. Call your electricity provider immediately and wait for a licensed electrician.
Step three: Shut off gas at the meter or bottle. Floodwater can shift appliances and rupture gas lines. A fast move here prevents a compounding disaster.
Step four: Stop the water source. If the flood inside the house comes from a burst pipe or failed appliance, locate the individual isolation valve or turn off water at the mains. Street shutoff valves often require a specialised key. It’s worth buying one now and keeping it accessible.
Once these four critical tasks are done, you’ve arrested the emergency. Your emergency flood response just bought you breathing room.
Floodwater is deceptive. It hides hazards that kill more people than the water itself. Here’s what isn’t obvious when you’re standing in a flooded house:
When water flooding house comes from inside your plumbing rather than external inundation, swift source shutdown changes the damage equation dramatically.
For burst flexi-hoses (the number one culprit in Australian homes), shut the nearest isolation valve by turning it clockwise. For hot water system failures or appliance hose ruptures, isolate at the individual fixture stopcock. For anything beyond your immediate control, the mains shutoff at the water meter is your emergency brake.
One exception: if floodwater outside the home is the source and it’s still rising, you cannot stop it. Focus entirely on the four safety priorities above and evacuate if advised.
Before you move a single piece of furniture or wipe down a skirting board, document everything. Insurers process claims based on evidence, not narrative. Here’s the unglamorous reality of flood claims success:
Once authorities or emergency services confirm safe re-entry, the race against damaged by water becomes a sprint. Every hour water sits in your home, it migrates further: wicking up plasterboard, penetrating timber, saturating insulation.
For shallow standing water (less than 15mm), a wet-dry shop vacuum with its filter removed handles the job efficiently. Mop and bucket method works but exhausts you quickly. For larger volumes of water flooding house interiors (15mm and deeper), submersible pumps are essential. They move water fast and connect to standard garden hoses for discharge well away from the foundation. For major flooding, a specialist pump might be necessary to remove water efficiently.
The hierarchy is simple: pump for volume, wet-dry vac for residual, towels and mops for final surface moisture. Don’t use standard household vacuums. Water and electricity don’t belong in the same appliance unless it’s specifically rated.
Pay special attention to water trapped in wall cavities, under cabinetry kickboards, and inside floor registers. These hidden reservoirs drive ongoing humidity and mould growth. Drill weep holes at the base of plasterboard walls if water has wicked up beyond the skirting board height. This allows drainage from within the cavity.
Drying a flooded house requires aggressive air movement and moisture extraction working in tandem. Opening windows works only when outside humidity is lower than inside. In Brisbane’s subtropical climate, this often isn’t the case. You need mechanical assistance.
Start with industrial air movers positioned to create cross-flow turbulence across all wet surfaces. Aim them at 45-degree angles to walls and floors. Add commercial dehumidifiers: the refrigerant-type for warmer conditions, desiccant-type if you’re dealing with cooler or humid weather. Together, they create a vacuum effect that draws moisture from building materials into the air, then strips it from the air into collection tanks.
Monitor progress with a moisture meter, not your instincts. Plasterboard feels dry long before the internal gypsum reaches safe moisture levels. Timber framing that reads above 16% moisture content is still breeding ground for rot and mould.
Floodwater contamination makes the salvage-or-discard calculus brutal. Be honest with yourself.
Generally salvageable:
Almost always discard:
Professional sewage clean-up is essential when black water contamination is present. The 48-hour rule is real. Mould establishes colonies within 24 to 48 hours on organic materials. After that window, remediation moves from cleaning to demolition.
Visible water is only half the problem. Flood damage house assessment must go deeper, literally into walls, under floors, and into the building’s skeleton.
Water leaves a forensic trail. Knowing what to look for prevents you from sealing moisture inside your building envelope. The signs of water damage to hunt for include:
Not all flood damage threatens your home’s structural integrity. Distinguishing between surface-level issues and genuine danger saves thousands in unnecessary repairs, or prevents catastrophic failure.
Cosmetic damage looks alarming but poses no structural risk:
Dangerous structural damage requires immediate professional assessment:
The difference between cosmetic and dangerous isn’t always obvious. When in doubt, a structural engineer’s inspection costs less than a structural failure.
The question of carpet survival comes down to two factors: water source and saturation duration.
Clean water (from a burst supply pipe) on carpet for less than 24 hours can often be extracted, dried, cleaned, and reinstated. Grey water (from washing machines or dishwashers without sewage contamination) might be salvageable with hot-water extraction and antimicrobial treatment within 12 hours.
Black water (any floodwater containing sewage, river overflow, or stormwater runoff) means immediate disposal. No exceptions. The pathogen load makes sanitisation impossible in a residential setting.
Carpet underlay is universally unsalvageable after any flood. Its open-cell foam or felt structure acts as a sponge, holding water against the subfloor indefinitely. It’s inexpensive to replace and ruinously expensive to leave in place. We’ve extracted underlay that still dripped three weeks after the visible carpet surface felt dry.
For detailed carpet drying techniques, see our guide: How to Dry Wet Carpet Quickly
The water’s gone. The fans are running. Now the real work begins. The flood recovery process extends weeks beyond the visible water event, and the decisions made in this phase determine whether your home truly recovers or harbours long-term problems beneath freshly painted surfaces.
Insurance claims processes vary by provider, but a methodical approach improves outcomes across the board:
Mould is not a cosmetic nuisance. It’s a health hazard that can render a home uninhabitable. After a flood, mould prevention means moisture elimination. There’s no shortcut.
Maintain relative humidity below 60% using dehumidifiers and air conditioning. Remove any materials that show visible mould growth within 24 to 48 hours. Treat wall cavities with antimicrobial sprays where water has penetrated but full sheet removal isn’t planned. Leave cupboard doors, wardrobes, and any enclosed spaces open to airflow. Replace rather than attempt to clean fibrous insulation materials. Use professional mould remediation services if mould appears widespread.
Recovery happens in phases. The emergency phase lasts 1 to 7 days and focuses on water extraction, drying, and making the property safe. The assessment phase runs 7 to 30 days, involving insurance assessments, structural inspections, and detailed scoping of repair work. The restoration phase extends 30 to 90 days or more, covering strip-out, drying confirmation, reconstruction, and refinishing.
Expect the unexpected. A wall that dried beautifully in week one can still develop mould in week four if humidity wasn’t properly controlled. Rushing to reinstall flooring before subfloor moisture readings stabilise virtually guarantees cupping, buckling, or rot within 12 months.
DIY has limits. Flood damage restoration professionals bring equipment, expertise, and the ability to see what homeowners miss. The threshold where professional help becomes essential is lower than most people assume.
Professional restoration isn’t just pumping water and setting up fans. It’s a systematic process starting with moisture mapping: using thermal imaging and penetrating moisture meters to map the full extent of water migration, including inside wall cavities and under floor coverings. It continues with targeted extraction using truck-mounted or high-volume portable extraction units that remove water ten times faster than consumer equipment.
Industrial drying follows, with commercial air movers, dehumidifiers, and specialist drying systems for wall cavities and underfloor spaces. Antimicrobial application ensures sanitisation rather than just surface cleaning, and restoration includes controlled demolition of unsalvageable materials, reconstruction, and final finishing.
The key difference is speed and thoroughness. Professionals dry a home in 3 to 5 days; DIY efforts often take weeks and still leave moisture behind.
For professional assistance, see our Storm & Flood Restoration service page.
Costs vary dramatically based on water source, affected area, and contamination level. Clean water extraction from a single room sits at the lower end of the scale.
Grey water or black water (Category 2 to 3) flooding across multiple rooms costs significantly more due to decontamination requirements, controlled demolition of affected materials, full structural drying, and waste disposal. Full reconstruction costs sit on top and depend entirely on finish level and material choices.
Insurance typically covers professional restoration. If your policy includes flood cover, engaging experts ensures the work meets the standard your insurer expects, and you avoid the risk of out-of-pocket rectification later.
Not all restoration companies operate to the same standard. Ask direct questions:
A professional restoration company answers these questions clearly and without hesitation. Evasive answers are a red flag.
Ensure everyone’s immediate safety, then if possible without risk, turn off electricity, gas, and water at their mains or isolation points. Document everything with photos and video before moving anything. Then contact your insurer and begin water extraction.
With professional equipment, 3 to 7 days for full structural drying under normal conditions. Without professional equipment, drying can take 2 to 4 weeks and may still leave hidden moisture that causes future problems. Drying time is affected by humidity, temperature, air movement, and the materials affected.
In almost all cases, yes, though “saved” means different things depending on water depth, duration, and contamination level. A flood destroys soft furnishings and finishes, but the structure itself is almost always restorable with proper professional intervention. Houses that appear destroyed are often fully recoverable.
It depends entirely on your policy wording. Flood cover is not automatic in Australia. Many policies offer it as an optional extra or exclude it altogether. Check your Product Disclosure Statement or call your insurer directly to confirm. “Storm damage” and “flood damage” are legally distinct categories in insurance policies.
Signs include persistent musty or earthy odours, skirting boards or architraves that remain damp to touch, peeling or bubbling paint appearing weeks after the event, floor coverings lifting or shifting, and visible mould in corners or behind furniture. A professional moisture inspection using penetrating meters and thermal imaging reveals what the naked eye misses.
A flood emergency tests every homeowner. The difference between a home that recovers completely and one that harbours ongoing problems comes down to the speed and thoroughness of the initial response. Safety first, water out fast, dry aggressively, document everything, and know when to call in those who do this work every day.
Recovery takes time, but with methodical action from the first hour onward, your home will be restored, your claim processed, and your life rebuilt. One step at a time.
