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Toronto recently faced a significant power outage, leaving approximately 170,000 customers without electricity. This widespread disruption, caused by heavy rains and extensive flooding, underscores the importance of being prepared for emergencies, particularly when protecting your home’s foundation and basement. In the wake of such events, homeowners must understand the risks and take preventive measures to safeguard their properties.
On a stormy Tuesday, a torrential downpour struck the Greater Toronto Area (GTA), leading to severe flooding across the region. The intensity of the rainfall affected several highways, roads, TTC stations, and other critical infrastructure. Environment Canada reported that up to 125 millimetres of rain fell in some areas, overwhelming the city’s drainage systems and causing significant disruptions.
According to CityNews, the severe flooding possibly impacted a Hydro One transmission station, resulting in a massive power outage. The outage map on Toronto Hydro’s website showed extensive areas without power, including Toronto, Parkdale, East York, and Liberty Village. Toronto Hydro confirmed that around 170,000 customers were affected, making it one of the most widespread blackouts in recent years.

As Toronto Hydro worked tirelessly to restore power, many residents faced an additional, less obvious threat: the failure of their sump pumps and basement leaks. Without electricity, sump pumps — crucial for preventing basement flooding — ceased functioning, leaving homes vulnerable to water damage.
Sump pumps play a vital role in protecting homes from basement flooding. These devices are designed to remove accumulated water from the sump basin, typically found in the basement. They activate automatically when the water level rises to a certain point, pumping the water out and away from the house. This process prevents water from accumulating and causing damage to the foundation and basement.
However, during a power outage, sump pumps stop working without a backup power source. Without a functioning sump pump, your home becomes vulnerable to water damage, as rainwater can quickly accumulate and seep into your basement. This can lead to significant problems such as basement flooding, foundation damage, and the growth of mold and mildew, which can pose health risks to the inhabitants.
Given the increased risk of basement and foundation leakage during power outages, homeowners should prioritize basement waterproofing, which involves a series of measures designed to prevent water from entering your basement and causing damage. Here are some essential steps to consider:
1. Sump Pump Services: Ensure your sump pump is in good working condition. Regular maintenance and inspection can prevent failures during critical times. Consider investing in a battery backup system to ensure your sump pump continues functioning during power outages. Backup systems can provide peace of mind, knowing your basement is protected even when the power goes out.
2. Basement Waterproofing: Waterproofing your basement involves various methods to keep water out and protect your foundation. These include installing interior and exterior drainage systems, applying sealants to walls and floors, and ensuring proper grading around your home’s foundation to direct water away from the building. Exterior waterproofing typically involves excavating the soil around your home to apply a waterproof membrane to the foundation walls. Interior waterproofing methods include installing a sump pump and a drainage system that channels water away from the foundation.
3. Wet and Leaky Basement Inspection: Regular inspections can identify potential issues before they become significant problems. Look for signs of moisture, such as damp spots, mold growth, or a musty odor. Professional inspectors can thoroughly assess and recommend necessary repairs to prevent future leaks. An inspection might also include using advanced tools like moisture meters and thermal imaging cameras to detect hidden water problems.
4. Foundation Repair: Addressing existing cracks and leaks in your foundation is crucial for preventing water intrusion. Foundation repair specialists from Waterproofing PD can seal basement cracks and reinforce weak areas to ensure your home’s structural integrity. We may recommend additional waterproofing measures to protect your basement further.
In the aftermath of the recent power outage and flooding, Toronto residents must assess the condition of their homes and take preventive measures to safeguard against future incidents. By prioritizing sump pump maintenance, basement waterproofing, and regular inspections, homeowners can reduce the risk of water damage and ensure the safety and stability of their properties.
1. Conduct a Thorough Inspection: Inspect your basement and foundation for any signs of water damage. Look for cracks in the walls and floors, damp spots, and mold growth. Please pay attention to any unusual smells indicating hidden moisture problems. If you notice any issues, contact a professional to assess the damage and recommend appropriate repairs.
2. Maintain Your Sump Pump: Test your pump regularly to ensure it functions correctly. Pour a bucket of water into the sump pit to see if the pump activates and removes the water. If the pump does not work, check for clogs in the discharge pipe or contact a professional for repairs. Consider installing a battery backup system to keep your sump pump running during power outages.
3. Invest in Waterproofing Solutions: Depending on the condition of your basement, you might need to invest in various waterproofing solutions. Exterior waterproofing can prevent water from entering your home, while interior systems can manage any water that does get inside. A professional waterproofing contractor can help you determine the best approach for your home.
4. Address Drainage Issues: Ensure the ground around your home slopes away from the foundation. This helps direct rainwater away from your house and reduces the risk of basement flooding. Clean your gutters and downspouts regularly to prevent clogs, and consider extending downspouts to discharge water further from your home.
5. Prepare for Emergencies: In addition to waterproofing and sump pump maintenance, prepare for emergencies by having a plan in place. Keep a supply of sandbags and plastic sheeting on hand to create barriers against flooding. Consider installing a generator for backup power for your sump pump and other critical appliances during outages.
The recent storm and subsequent power outage in Toronto are not isolated incidents. Climate change leads to more frequent and severe weather events, including heavy rainfall and flooding. As a result, homeowners need to be more vigilant and proactive in protecting their properties from water damage.
Governments and utility companies also have a role in addressing these challenges. Investing in resilient infrastructure, improving drainage systems, and implementing flood mitigation measures can help reduce the impact of severe weather events. Public awareness campaigns can educate residents about the importance of flood preparedness and basement waterproofing.
The recent power outage in Toronto reminds us of our homes’ vulnerabilities during extreme weather conditions. Taking proactive steps to protect your basement and foundation from water damage can save you from costly repairs and provide peace of mind during future storms. By prioritizing sump pump maintenance, basement waterproofing, and regular inspections, homeowners can significantly reduce the risk of water damage and ensure the safety and stability of their properties.
Don’t wait until the next heavy rain to inspect and waterproof your basement — do it today to protect your home from unexpected damage.
Visit ontario.ca/floods to learn what to do before, during, and after a flood.
Stay safe, Toronto!