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Flood Warning & Flood Watch - Update

The North Bay–Mattawa Conservation Authority (NBMCA) has issued the following alerts due to rising water levels caused by heavy rain and snowmelt:

⚠️ Where Flooding Is Occurring or Expected

  • Flood Warning (flooding is happening or expected very soon):

    • Lake Nipissing shoreline in Callander and North Bay
    • Most of the North Bay–Mattawa watershed, including:
      • Wasi River
      • La Vase River
      • Mattawa River upstream of Hurdman Dam
  • Flood Watch (flooding is possible – be prepared):

    • Mattawa River downstream of Hurdman Dam

💧 What’s Happening

  • April has seen more than double the normal rainfall, along with rapid snowmelt.
  • Water levels in rivers and lakes rose quickly and, while some areas are starting to slowly recede, Lake Nipissing continues to rise.
  • Lake levels are expected to reach flood levels in the next few days and may be similar to the 2019 flooding in the coming weeks.
  • Lake ice combined with high water increases the risk of shoreline erosion and damage.

🚧 Closures and Operations

  • Corbeil Conservation Area and Mattawa Island Conservation Area remain closed due to flooding.
  • Eva Wardlaw Conservation Area is also closed while flood control operations are underway.
  • The Parks Creek backflood control structure is being actively operated to reduce flood risk in nearby neighbourhoods.

👷 What Residents Should Do

  • Residents in low‑lying or flood‑prone areas should closely monitor conditions.
  • Be prepared for potential flooding, shoreline damage, and local disruptions.
  • Keep children and pets away from rivers, streams, and lake edges — water is cold, fast-moving, and banks are slippery.
  • Avoid flooded areas and respect all closures and warnings.
  • If you need help during a flood emergency, contact your municipality.
    • If you live in an unorganized area, contact the Ministry of Natural Resources – North Bay District.

🗓 How Long This Notice Is in Effect

This flood message will remain in effect until at least Tuesday, April 28, 2026 at 4:00 p.m., unless updated sooner. Read the entire notice here.

📡 Ongoing Monitoring

The NBMCA will continue to monitor weather and water conditions and will issue updates as needed. Residents are encouraged to stay informed through municipal channels and official alerts.

 

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