Toronto homeowners know that our city’s weather can be unpredictable. The old infrastructure and heavy rainfall often lead to basement flooding.
A flooded basement can be overwhelming and damaging. It can also be dangerous. This can happen during a spring thaw, a summer downpour, or a plumbing disaster.
In this guide, we will show you what to do if your basement floods. We will cover safety steps, cleanup, and how to prevent future problems. Let’s help you take control of the situation with confidence.
1. Prioritize Safety First
Never rush into a flooded basement: We must address serious safety concerns first.
Electrical Hazards
Water conducts electricity. If flooding water in your basement has reached electrical outlets, your furnace, heaters, or electrical panel, you are at risk. This can lead to electrical shock or electrocution.
What to do:
- Do not enter the affected area unless a licensed electrician or qualified professional has confirmed it’s safe.
- If you are sure you can do it safely, turn off the power at the main breaker. Do this only if the breaker is in a dry area and not underwater.
For official guidance, consult the Electrical Safety Authority of Ontario (ESA) at esasafe.com.
Gas/ Water Leaks and Appliances
Toronto residents with natural gas systems must be extra cautious during a flood. If floodwater has submerged or touched your furnace, water heater, dryer, or other gas appliances, do not use them.
Signs of a potential gas leak include:
- A smell like rotten eggs (sulphur)
- Hissing sounds near a gas line or appliance
- Dead or discoloured vegetation outside near the gas line
What to do:
- Evacuate the house immediately.
- Do not touch any lights or electrical devices.
Pollutants and Contaminants
Many Toronto basement floods come from sewer backups, which means the water may contain raw sewage. This poses a serious health risk because of harmful bacteria and viruses.
Protective gear is a must:
- Rubber boots and gloves
- Safety goggles
- N95 or surgical mask
- Disposable coveralls or old clothing you can throw away
Don’t assume water is clean just because it looks clear—always take precautions.
2. Stop the Source of the Flood
If it’s safe to do so, try to identify where the water is coming from.
- When experiencing a Burst Pipe: Shut off the main water valve immediately.
- When experiencing a Sewage backup: Avoid flushing toilets, running water, or using any drains.
- When experiencing Heavy Rain: Your backwater valve may have turned on to stop sewage from backing up. However, this also stops your water from draining.
If you’re unsure of the source or feel unsafe, call a professional water damage restoration or plumbing company.
3. Document Everything for Flood Insurance
Insurance companies expect detailed documentation of flood damage.
What to do:
- Take clear photos and videos of the flooded area and all affected belongings.
- Make a list of damaged items (include estimated value and purchase receipts if possible).
- Keep all receipts related to cleanup, repairs, or temporary accommodations.
Call your insurance provider as soon as possible. In Toronto, most home insurance policies do not cover flood damage automatically. However, you might have sewer backup or overland water protection if you choose it.
Pro tip: Insurance companies might renew or extend your coverage if you take steps to prevent damage after a flood.
4. Begin Safe Cleanup Procedures
Once you’ve ensured it’s safe and you’re properly protected, it’s time to start cleanup.
Step 1: Remove Standing Water
Depending on the amount of water, you may need:
- A wet/dry vacuum
- A sump pump
- Help from a professional water damage restoration company
Do not use a regular household vacuum.
Step 2: Dry and Disinfect
Once water is removed:
- Use fans, dehumidifiers, and open windows to increase ventilation.
- Disinfect all hard surfaces using a bleach-water solution (1 cup bleach per gallon of water).
- Remove water and discard:
- Wet drywall
- Insulation
- Carpeting and underpadding
- Wood flooring, if waterlogged
Step 3: Sort and Salvage
- Separate items into salvageable vs. total loss.
- Professionals should clean or discard soft items (furniture, mattresses, clothing) if they become contaminated.
- Inspect electronics and appliances before reuse.
You might need to go to a Toronto waste depot several times. Make sure to follow the City’s rules for disposal, especially for contaminated materials.
5. Professional Restoration Services in Toronto
Flood cleanup can be overwhelming. In many cases, hiring a certified restoration company is the best move.
Look for:
- IICRC-certified professionals
- 24/7 emergency flooded basement response
- Services include water removal, structural drying process, decontamination, and mold prevention
A professional team can often save time, reduce stress, and help avoid long-term issues like mould, which can begin forming within 24-48 hours.
6. Prevent Future Flooding: Solutions for Toronto Home or Business
Toronto’s older homes and infrastructure can make basement flooding more common, but there are many ways to lower your risk.
Install a Backwater Valve
These valves stop city sewer water from backing up into your home. Toronto has a Basement Flooding Protection Subsidy Program. This program can cover up to 80% of the cost, which is up to $1,250, to install a system.
Learn more and apply here
Upgrade or Add a Sump Pump
A sump pump removes excess water before it enters your basement. Choose a model with:
- Battery backup (in case of power outage)
- Alarm systems
- High-capacity pumps for large volumes
Improve Drainage Systems Around Your Home
- Ensure your lot is graded to slope away from the foundation
- Clean eavestroughs and downspouts regularly
- Extend downspouts at least 2 metres away from your home
Renovate With Water in Mind
If you’re rebuilding after a flood, consider these flood-resistant renovations:
- Use water-resistant insulation (like closed-cell foam)
- Install ceramic or vinyl flooring instead of carpet
- Elevate electrical outlets and appliances above floor level
- Avoid storing valuables directly on the floor—use shelving or watertight containers
8. Final Thoughts
Flooding is one of the most stressful things a homeowner can face. This is especially true in a city like Toronto, where bad weather and city infrastructure often clash. But with quick action, the right safety measures, and proactive prevention, you can protect your property and your peace of mind.
Remember:
- Stay safe: never enter a flooded area unless it’s confirmed safe
- Call your insurance company early and document everything
- Don’t hesitate to call in the pros for cleanup or repairs
- Take preventative measures to lower your risk in the future
If you’re dealing with a flooded basement right now, don’t panic—just take it step by step. Need Emergency Help With a Flooded Basement in Toronto?
Get in touch with a certified water damage restoration company right away. Time is of the essence when dealing with water intrusion and the risk of mold or structural damage.
CPR24 Restoration covers all neighbourhoods in Toronto, including: Agincourt, Don Mills, North York, East York, York, Yorkville, York Mills, Forest Hill, Scarborough, Etobicoke, Downtown Toronto, Mimico, Danforth, High Park, etc.
