Montreal activated its Special Intervention Plan (PPI) this week as water levels rise along the Ottawa River and Rivière des Prairies, though officials say no flooding has been observed so far – and on Thursday, they pushed that to a level 3, the highest level.
Despite the rising rivers, the city says there is currently no flooding on the ground. Residents in at-risk areas are being urged to stay informed through municipal alerts and local updates as conditions continue to evolve.
Preventive flood protection measures have already been deployed in several sectors, including Pierrefonds-Roxboro, L’Île-Bizard–Sainte-Geneviève and Ahuntsic-Cartierville. These include temporary dikes, pumps, inflatable barriers and valve closures at key infrastructure points, with additional installations planned in the coming days.
In Pierrefonds-Roxboro, barriers and pumping systems have been installed or are being set up along multiple streets and near the filtration plant, while similar protections are in place around Parc Terrasse-Sacré-Cœur in L’Île-Bizard–Sainte-Geneviève. Officials say further measures remain on standby depending on water levels.
Flows at Carillon on the Ottawa River were measured at about 6,100 m³/s Friday morning, with forecasts calling for a potential peak near 7,050 m³/s on April 18. The Rivière des Prairies is also running high at roughly 2,400 m³/s and continuing to increase.
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City officials say they are maintaining close monitoring of river conditions and possible impacts along shorelines, including checking for encampments in vulnerable riverside areas. No injuries or major incidents have been reported.
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