March 5, 2026

The Raisin Region Conservation Authority (RRCA) is issuing a Watershed Conditions Statement – Flood Outlook for the RRCA jurisdiction. A Flood Outlook is issued to provide early notice of flooding potential based on weather forecasts calling for heavy rain.

Weather Forecast: Environment Canada is forecasting sustained above-zero temperatures beginning March 6. Daytime highs may reach up to 15°C in some areas, which is expected to accelerate snowmelt. The warmer conditions will likely be accompanied by rainfall, with totals of up to 20 mm possible by March 8. The extended forecast also indicates a continued warming trend, with the potential for an additional 20 mm of rainfall between March 10 and 13.

Environmental Conditions: Current water levels are at normal for this time of year in the RRCA jurisdiction. The anticipated rainfall and warm temperature beginning this weekend is expected to result in increased water levels and flows in the rivers.

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: 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 Friday March 13, at 1:00 pm. 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.