Class action lawsuit requests have been filed against the City of Dollard-des-Ormeaux (DDO) and the Pierrefonds-Roxboro borough following catastrophic flooding that struck Montreal's West Island on June 20, 2026. The legal actions allege that municipal authorities failed to adequately prepare for or respond to the severe rainstorm, which left streets submerged and hundreds of residents displaced.
Flooding aftermath and legal action
The June 20 storm dumped more than 100 millimetres of rain in a few hours, overwhelming drainage systems and causing widespread flooding across the West Island. Abandoned cars sat on flooded streets in Pointe-Claire, and Highway 40 was closed during the downpour. In DDO and Pierrefonds-Roxboro, basements filled with water, and many homes suffered structural damage.
According to the class action requests, the municipalities did not maintain their stormwater infrastructure or issue timely warnings. The filings seek compensation for property damage, loss of use, and other expenses incurred by affected residents. A Montreal law firm representing the plaintiffs stated, “The municipalities had a duty to protect their citizens, and they failed. We are seeking accountability.”
Municipal responses and ongoing investigations
Officials from DDO and Pierrefonds-Roxboro have not yet commented on the lawsuits. The City of Montreal said it is reviewing the situation. Meanwhile, the Quebec government has announced an investigation into the flooding and municipal preparedness. Affected residents are encouraged to document their losses and keep receipts for repairs.
The class action requests are preliminary and must be authorized by a judge before proceeding. If approved, they could cover hundreds of households. Similar lawsuits have been filed after past floods in Quebec, setting a precedent for municipal liability in extreme weather events.
Broader implications for flood management
The June 20 storm is part of a trend of increasingly intense rainfall events linked to climate change. Environmental groups argue that municipalities must invest in green infrastructure, such as permeable surfaces and expanded stormwater retention, to reduce flood risks. The lawsuits may pressure local governments to accelerate such measures. As one resident noted, “We can’t keep rebuilding after every storm. Something has to change.”
