Updated information

March 24, 2020



COVID-19 / Floods measures

The municipality is closely monitoring the water levels with the various collaborators and is currently implementing emergency measures in anticipation of potential floods.

In the event of flooding this year, the situation surrounding COVID-19 could complicate the provision of support services.

It is therefore very IMPORTANT that you, in high-risk areas, take all the necessary measures to prepare yourself adequately by assuring essential manpower, equipment and materials before flooding occurs, if applicable.

Given the current situation, please note the extraordinary measures:

  • The provision of Public works services must not be considered as a front-line option for the protection of your properties considering the possibility of eventual limited personnel, supplies or sandbags;
  • To avoid the risk of contamination, the government will not allow the opening of shelters for flood victims. Therefore, we invite residents in high-risk areas to think about where they could stay in the event of a flood;
  • We will provide the necessary hygiene products and equipment to the team on duty in order to limit the spread of the virus;

A letter with more instruction will be sent door to door to the high-risk areas. In the meantime, visit our website to find out how you can prepare.

For Public Works emergencies call 514 630-1234


A flood occurs when an shoreline area is submerged because the volume of the body of water has surpassed the capacity of its bed. Major floods usually happen when snow melts in the springtime, during periods of heavy rain, but also in wintertime when frazil accumulates (see Types of Floods). A quick and major increase of the water level can also occur when a dam breaks.


Senneville is a municipality nestled by the Lac des Deux-Montagnes. As such, floods and Frazil Ice are one of the main natural hazards occurring on the territory.  

During the year, flood forecasters monitor the amount of rainfall and snow and the impact on levels on rivers, lakes, creeks and streams.




Water flood surveillance

Due to risk of flooding, several bodies of water are subject to continuous monitoring.

A body of water is flooded when its last measurement is above its minimum flood threshold (SIM). Click below to view the chart or hydrograph.

 Reference: Ministère de la Sécurité publique



Flood sectors

Here are some maps of the 2017 floods, however they do not have the legal value of the provincial flood ratings.

Flood sectors

Phone Numbers & Contact Information


Emergency in public security 24/7

Emergency services in public security are available all year round, 24 hours a day, 7 days a week.

Emergency situation - Hydro-Quebec

Road Information: 511 (www.quebec511.info



Health ​r​​​​isk

Floods can occur when a body of water overflows, during high tides or after heavy rains. The consequences of a flood or heavy water damage at home could have adverse effects on the health of the occupants. The Centre intégré de santé et de services sociaux (CISSS) de l'ouest-de-l'ile-de-Montréal can give you information if you are worried about your family's health or your own, with regard to mould, unsanitary conditions, etc. In case of doubt, you can phone 811.​

Health problems caused by molds

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