Flood Watch Update
This is an update to the Flood Watch released on March 9th, 2026. Rainfall received over the weekend has led to increasing river levels, flooding of low-lying areas and unsafe conditions near waterways. Additional rainfall forecasted for March 11th into the 12th could lead to further flooding depending on the total amount of precipitation received.
Weather Forecast: Environment Canada is forecasting a mix of freezing rain and rainfall over the next day, with total amounts of approximately 40 mm by March 12th. The amount of forecasted freezing rain compared to rainfall varies depending on location across the jurisdiction.
The extended forecast shows a decline in temperatures after March 12th, returning to more seasonal temperatures above zero-degree daytime highs and nighttime temperatures falling below zero. Additional snowfall is forecasted over the weekend.
Environmental Conditions: Water levels and flows in local rivers and streams remain high due to recent rainfall and snowmelt. Ground conditions are saturated, limiting infiltration and increasing runoff to waterways that are already near capacity. Ice remains in the main river systems, and rising flows could cause ice movement or breakup, increasing the risk of localized ice jams.
Based on current forecasts, the SNC flood forecasting model indicates that water levels are expected to increase over March 11th and 12th, potentially resulting in additional flooding in low-lying areas, floodplains, and areas with poor drainage.
Risks: Rivers throughout the jurisdiction currently have elevated water levels, fast-flowing water, and slippery or unstable banks, creating hazardous conditions near waterways. Remaining river ice also increases the potential for ice breakup and ice jam formation at bridges, culverts, and other channel constrictions.
The extent of flooding will depend on the amount and timing of rainfall over the coming days. Additional updates will be provided as forecasts become more certain.
ACTION: Residents in flood-prone or low-lying areas, historically susceptible to flooding, should take the necessary precautions to protect their property.
Please ensure:
- Sump pump is clear, in good working condition and has a backwater valve on it.
- Easy access to portable backup generator and pump.
- Downspouts are clear and the outlet is at least 3 m from the dwelling.
- Driveway culverts are clear of debris and drain well.
- Securing items that might float away as flows increase.
Residents are advised to continue to exercise extreme caution near rivers and waterbodies due to increasing river flows and slippery conditions. Any ice-covered bodies of water are considered unsafe. Parents are encouraged to explain these dangers to their children.
Duration: This flood watch statement is in effect until March 16th, 2026 at 5 PM or until an update has been issued.
SNC monitors the water levels and weather forecasts as part of the Flood Forecasting and Warning Program. Updates are provided as conditions change.
Please visit www.nation.on.ca for more information. To provide feedback with respect to changes in water related conditions please email waterwatch@nation.on.ca, post on our Facebook (/SouthNationConservation) or Twitter (@SouthNationCA).
FOR MORE INFORMATION: Kat Watson, Coordinator, Early Warning Systems
and Watershed Plans; 1-877-984-2948, kwatson@nation.on.ca.