The city of Pembroke, Ont., has reported minor flooding along the Ottawa River, with the potential for major flooding between Arnprior and Cumberland in the coming week. Minor flooding involves the inundation of streets, lawns, and parks, affecting a limited number of buildings. In contrast, major flooding would impact several streets and buildings.
Historically, the Ottawa River experienced major flood levels in 2017, 2019, and 2023. The Ottawa River Regulation Planning Board attributes the current rise in water levels to recent rainfall and snowmelt in northern regions.
Forecasts indicate a gradual increase in water levels in Pembroke over the next few days, with up to 30 millimetres of rainfall expected by Sunday. According to the latest updates from the planning board, water levels at various measuring points along the river show the following trends:
– Pembroke area: Just below 113 metres above sea level, expected to remain stable until Sunday, approximately 30 centimetres below the record high.
– Fort-Coulonge area: Around 108 metres, a record high for the current date, expected to surpass all-time highs by Sunday.
– Arnprior area: Approximately 75 metres, forecasted to reach 75.5 on Sunday, about 40 centimetres below the record high for that date.
– Britannia area: About 59.55 metres, expected to exceed 60 on Sunday, slightly below the record high.
– Hull area: Around 43.5 metres, forecasted to reach 44.25 on Sunday, nearly 20 centimetres above the record high.
– Thurso area: Approximately 42.4 metres, expected to reach 42.85 on Saturday, slightly below the record high.
The Rideau Valley Conservation Authority warned of potential major flooding between Arnprior and Britannia over the weekend and downstream from Britannia starting Monday. Residents in flood-prone areas are advised to secure their properties and prepare accordingly.
In southern regions, the Cataraqui Conservation extended its safety advisory, urging caution around dams and fast-flowing watercourses. While some low-lying areas may experience inundations, widespread flooding is not anticipated in the region.
Quebec’s flooding information map reported minor flooding in Ripon from the Petite Nation River and expressed concerns about the Rouge River near the rue Walker bridge. Additionally, water safety statements and flood watches are in effect in eastern Ontario’s conservation authorities, with the potential for a flood warning.
Environment Canada forecasts approximately 15 millimetres of rainfall in the region on Thursday. To address the situation, Pembroke and Ottawa are providing sandbags to residents, and authorities are closely monitoring roads near the river for potential closures.
The City of Gatineau is actively preparing for possible flooding, monitoring roads near the river and offering sandbags to residents. Firefighters will be assisting residents in vulnerable areas and providing necessary support. Residents in other regions are advised to stay informed through local authorities and take necessary precautions.