Mississippi River watershed returns to flood watch status

WEST CARLETON – The Mississippi Valley Conservation Authority (MVCA) has downgraded the status of the Mississippi River watershed back to flood watch and water levels and flows begin to stabilize.

“This flood watch is an update to the flood warning for the Mississippi River watershed issued on April 22,” the MVCA Water Management team released in a statement today (April 28). “A flood watch statement indicates flooding is possible in specific watercourses or municipalities. Municipalities, emergency services and individual landowners in flood prone areas should prepare.”

As the temperature dips, the watercourses are expected to stabilize.

“Cooler conditions are expected late this week, with temperatures trending back to seasonal norms early next week,” the MVCA said. “A weather system on Wednesday (April 29) may bring 15 to 35 millimetres of rainfall, though total precipitation across the region over the next seven days is forecast to stay below 50 mm.” 

Water levels and flows remain high across the watershed.

“Seasonally elevated water levels continue along the Mississippi River as water moves through the system,” the MVCA said. “Water levels on Dalhousie Lake have begun to recede and have dropped below the 1:10 year flood threshold (157.50 metres above sea level), currently reaching 157.40 masl. Levels could rise again this week; however, the extent of any increase will depend on actual precipitation. Residents in flood prone or low-lying areas historically susceptible to flooding should maintain the necessary precautions to protect their property.”

Upper lakes (Mazinaw, Little Marble, Marble, Dalhousie and Mississagagon) remain in seasonal flood conditions.

“Water levels have peaked and continue to gradually recede this week,” the MVCA said.

Major tributaries (Clyde River, Fall River and Indian River) have peaked and levels and flows along these systems are receding towards seasonal levels.

“ Rivers and streams are experiencing higher water levels, fast flowing water and slippery or unstable banks,” the MVCA said. “Roads, driveways, and properties in flood-prone areas could be impacted. Residents are reminded to stay off of all water bodies due to high flows and slippery conditions. Parents are encouraged to remind children about these dangers and provide appropriate supervision.”

Residents in flood prone areas are advised to maintain close watch on water levels and flows and take the necessary precautions to protect their property by:

• Ensuring sump pumps are clear, in good working condition and have a backwater valve.
• Having a portable generator and backup pump available.
• Ensuring downspouts are clear and the outlet is at least 3 meters from any structure.
• Removing or securing items that might float away if flows increase.
• Keeping emergency phone numbers handy.
• Familiarizing yourself with your municipality’s emergency preparedness plan.

This message is in effect until May 5, 2026 or until an update has been issued.

Daily water levels and flows are available on the MVCA website at www.mvc.on.ca/water-levels.