INTERVENTION 1 Mode
- The weather forecast for the next few days predicts significant rainfall in the Ottawa River watersheds. This precipitation will substantially increase water flow in the Ottawa River, which will have a direct impact on the level of Lac des Deux-Montagnes.
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This situation may increase the level of Lac des Deux-Montagnes to the major flood threshold of and this flood water can be fast and unpredictable.
- Lac St. Louis is down, but the trend is up for the next few days.
- It is imperative that all residents whose homes are in the red zone implement ALL necessary measures to protect their homes and / or businesses.
- We remain in INTERVENTION 1 mode, but it will be adapted as needed in the next few days.
TRUSTED PARTNER ✅ 
LAC DES DEUX-MONTAGNES:
- Water levels are stable but remain above the
mid-level
flood threshold by about 300 mm (12 inches).- Risk of flooding is very high for citizens on the edge of Lac des Deux-Montagnes.
- Rue Sainte-Anne, between Saint-Charles and de l’Église, is under surveillance 24 hours a day.
LAC ST-LOUIS:
- Water levels are down, but remain above the
minor
flood threshold of about 250 mm (10 inches).- Risk of flooding is high for citizens on the edge of Lac St-Louis.
RIVIÈRE DE L’ANSE-À-L’ORME:
- For the North sector, the situation is stable. We are maintaining a constant watch on the l’Anse-à-l’Orme River, Leslie-Dowker, Meloche and Tremblay ditches as well as the Leslie-Dowker pumping station.
ROAD CLOSURE:
- Chemin de l’Anse-à-l’Orme, between chemin Senneville and north of Timberlea-Trail, is closed in both directions.
- Rue Saint-Joachim is closed between Sainte-Anne and Marguerite-Bourgeoys as a preventive measure.
We remind you that if you have not already done so, you can receive 2 pallets of sand for free. Affected owners must make the request by calling 514-457-6666. First come, first served.
The Quebec Ministry of Public Safety offers a compensation program for people who set up at least one temporary preventive measure. Get information on the Ministry’s website.
We are still monitoring the situation every 2 hours to follow the evolution of Lac St. Louis and Lac des Deux-Montagnes water levels. Plus, the Municipal Patrol has a 24/7 resource available.
The emergency flood line is activated. If a situation seems abnormal, please contact the City at 514-457-6666. In case of emergency, please dial 9-1-1.
