March 10, 2026
The Raisin Region Conservation Authority (RRCA) issued a Flood Watch for its jurisdiction on March 10, 2026. A Flood Watch is issued when flooding of infrastructure has not yet occurred but is possible under forecast weather conditions. The statement is an update to the Flood Outlook statement issued on March 5, 2026.
Weather Forecast: Environment Canada is forecasting continued above-zero temperatures which will result in additional snowmelt across the region. Rainfall is expected to begin on March 11 and continue through March 12, with total precipitation amounts potentially reaching up to 35 mm by March 12.
The extended forecast indicates temperatures will decline after March 12, with mostly below-zero conditions expected for the following week, along with the potential for some snow accumulation.
Environmental Conditions: Current water levels are now above normal for this time of year. It is expected to see an increase in water levels and flows throughout the week due to the anticipated rainfall.
Risks: All rivers and streams across the jurisdiction may experience high water levels, fast flowing water, and slippery or unstable banks. Flooding is possible in low lying areas.
In North Glengarry: There is a high risk of water backing up in areas typically susceptible to spring flooding downstream of Mill Pond. The water levels of Loch Garry, Middle Lake, and Mill Pond are being actively managed. Sudden increases in dam outflow may be necessary under the forecast weather conditions.
Residents in areas regularly affected by spring flooding should take precautions to protect their property, such as:
• Securing items that might float away as flows increase.
• Removing items from sheds, garages, basements, or lower floors that could be subject to flooding.
• Ensuring sump pump is clear, in good working condition, and has a backwater valve.
• Ensuring easy access to a portable backup generator and pump.
This statement is in effect until Monday, March 16, at 9:00 am. The RRCA will continue monitoring water levels and weather forecasts as part of the Flood Forecasting and Warning program. Updates will be provided as conditions change.
About Flood Forecasting and Warning in the RRCA Jurisdiction
The Ontario Ministry of Natural Resources (MNR) is responsible for flood related emergencies. Flood forecasting and warning has been delegated to conservation authorities. If a local emergency is declared, MNR will work directly with the municipality in consultation with the conservation authority.
The RRCA monitors precipitation and water levels throughout Cornwall, South Glengarry, and large portions of North Glengarry and South Stormont. For more information, and to view past statements, visit rrca.on.ca.