The Insurance Bureau of Canada (IBC) has issued insurance guidance for Ottawa-area residents after severe thunderstorms and record rainfall on Canada Day caused widespread flooding, power outages, and property damage across the region.
Ottawa's international airport weather station recorded 118 millimetres of rain in less than four hours on July 1, making it one of the rainiest days in the city's July history. The storm flooded roads and basements, downed trees and power lines, and forced the cancellation of the city's Canada Day festivities, including the evening fireworks display.
Ottawa Mayor Mark Sutcliffe described it as one of the worst flooding events the city has experienced in the past 25 years.
As of midday July 2, roughly 41,000 customers remained without power, with Hydro Ottawa citing submerged generators as a factor delaying restoration in some neighbourhoods. The cleanup continued into Thursday under a heat warning, with humidity pushing the humidex into the low 40s across much of eastern Ontario.
In response, IBC launched its Virtual Community Assistance Mobile Pavilion (V-CAMP) helpline, offering real-time guidance to residents beginning the claims process.
IBC outlined how different types of water damage are typically treated under home and business policies. Water damage from sewer backup is only covered where a policyholder has purchased optional sewer backup coverage. Overland flood coverage, which applies when rivers or other bodies of water overflow onto dry land, is widely available in Ontario but often carries coverage limits and may be unavailable in known flood-prone areas.
Meanwhile, water damage from a roof leak is typically covered under a standard policy, though the roof damage itself is not covered if caused by wear and tear or poor maintenance.
"The widespread flooding affecting communities across the Ottawa region is having a significant impact on residents, families and businesses, and our thoughts are with everyone dealing with its effects," said Anne Marie Thomas, director, consumer and industry relations at IBC. "As floodwaters recede and recovery begins, those who have sustained damage should contact their insurer to start the claims process."
The storm adds to a well-documented pattern of severe summer weather affecting the Ottawa area in recent years.
CatIQ estimated that a series of storms and flash floods across Ontario in the summer of 2023, several of which hit the Ottawa region hardest, caused more than $340 million in insured losses, with close to a quarter of that total tied to vehicle damage. A late-March 2025 ice storm affecting Ontario and Quebec caused a further $466 million in insured losses.
Nationally, severe weather caused more than $2.4 billion in insured losses across Canada in 2025, IBC's tenth costliest year on record for weather-related damage.
Events like this one have repeatedly renewed scrutiny of municipal stormwater infrastructure and liability in Ontario.
Under the Municipal Act, 2001, municipalities are generally protected from liability for flood damage caused by sewer or watermain failure unless negligence in design, construction, or maintenance can be shown, a standard of reasonableness rather than perfection that has limited successful claims against cities like Ottawa.
That protection has not stopped litigation elsewhere in the province: a proposed billion-dollar class action against the Town of Oakville alleges that upstream development expanded flood-hazard zones and diminished property values for residents along local creeks, a case cited by risk experts as a signal that Canadian municipalities face growing legal exposure as extreme rainfall events become more frequent.
IBC has estimated that roughly 10% of Canadian homes carry high flood risk, underscoring the exposure municipalities, insurers, and homeowners alike continue to navigate as infrastructure originally designed for historical rainfall patterns is tested by more intense storms.
The event also comes as Canada's proposed national flood insurance program, intended to extend affordable coverage to an estimated 1.5 million high-risk households, remains without a confirmed launch date, despite a federal commitment to deliver the program by April 2026.
IBC has said some insurers are reducing their exposure in higher-risk flood regions as climate-driven losses continue to rise.
