Flooding
What areas in Montréal are prone to flooding? What times of the year are associated with the highest risk? Find out about the risk of floods.
Montréal constantly monitors the water levels of the St. Lawrence River, the Rivière des Prairies, Lac Saint-Louis and Lac des Deux Montagnes, and also monitors weather forecasts during high-risk periods.
High-risk periods
Floods usually occur:
- In the spring when snow melts
- During the winter, when ice forms and blocks a stream or river
Flood-prone areas: Zones that are at risk
Areas bordering the Lac des Deux Montagnes and the Rivière des Prairies are at higher risk of flooding. If an alert is issued, the status of the situation and measures being taken in the field will be communicated to residents quickly.
- Ahuntsic-Cartierville (in French)
- L’Île-Bizard-Sainte-Geneviève
- Montréal-Nord (in French)
- Pierrefonds-Roxboro
- Pointe-Claire
- Rivière-des-Prairies–Pointe-aux-Trembles (in French)
- Sainte-Anne-de-Bellevue
- Senneville
Water levels can be viewed in real time on the Ministère de l’Environnement et de Lutte contre les Changements Climatiques Web site (in French). For residents of the St. Lawrence River and Lac Saint-Louis shorelines, the risk is low.
Learn more about the topic
Tips and articles
- Development of resilient drainage facilities to cope with heavy rain
- Emergency disaster preparedness kit
- Flooding: Instructions for evacuation
- Impacts of a disaster on property assessment
- Protecting your building from heavy rains
- Resilience to flooding during heavy rains
- River flooding: How to protect your home
- What to do after a flood
Tips and articles
- Development of resilient drainage facilities to cope with heavy rain
- Emergency disaster preparedness kit
- Flooding: Instructions for evacuation
- Impacts of a disaster on property assessment
- Protecting your building from heavy rains
- Resilience to flooding during heavy rains
- River flooding: How to protect your home
- Spring flood 2023 - Île-Bizard–Sainte-Geneviève is ready!
- Spring flooding - L'Île-Bizard–Sainte-Geneviève
- What to do after a flood
Tips and articles
- Development of resilient drainage facilities to cope with heavy rain
- Emergency disaster preparedness kit
- Flooding: Instructions for evacuation
- Impacts of a disaster on property assessment
- Protecting your building from heavy rains
- Resilience to flooding during heavy rains
- River flooding: How to protect your home
- What to do after a flood
Tips and articles
- Development of resilient drainage facilities to cope with heavy rain
- Emergency disaster preparedness kit
- Flooding: Instructions for evacuation
- Impacts of a disaster on property assessment
- Protecting your building from heavy rains
- Resilience to flooding during heavy rains
- River flooding: How to protect your home
- Spring Flooding - Pierrefonds-Roxboro
- What to do after a flood
Tips and articles
- Development of resilient drainage facilities to cope with heavy rain
- Emergency disaster preparedness kit
- Flooding: Instructions for evacuation
- Impacts of a disaster on property assessment
- Protecting your building from heavy rains
- Resilience to flooding during heavy rains
- River flooding: How to protect your home
- What to do after a flood
Tips and articles
- Development of resilient drainage facilities to cope with heavy rain
- Emergency disaster preparedness kit
- Flooding: Instructions for evacuation
- Impacts of a disaster on property assessment
- Protecting your building from heavy rains
- Resilience to flooding during heavy rains
- River flooding: How to protect your home
- Spring flood 2023 - Île-Bizard–Sainte-Geneviève is ready!
- Spring flooding - L'Île-Bizard–Sainte-Geneviève
- Spring Flooding - Pierrefonds-Roxboro
- What to do after a flood
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