Overview
- Forecasts show the Ottawa River leveling off Tuesday or Wednesday in the Ottawa–Gatineau area, with major flooding in places but levels still about 60 centimetres below 2019 records.
- Emergency crews in Gatineau report about 170 homes at risk and 44 streets closed as firefighters go door to door in low‑lying neighborhoods.
- Greater Sudbury declared a state of emergency Tuesday after river flows exceeded 100‑year flood benchmarks, and officials warned levels could keep rising for two to three weeks as northern snow melts.
- The Saint John River reached flood stage at Gagetown on Tuesday at 4.26 metres, with a peak near 4.4 metres expected Wednesday and Thursday and flood warnings in Fredericton and Jemseg.
- Communities ramped up defenses this week, with Ontario towns such as Minden Hills and West Nipissing under emergencies and large sandbag operations underway, while Montreal closed the Île Mercier bridge to vehicles and Manitoba First Nations prepared barriers and targeted moves for high‑risk elders.