UPDATE (May 4, 2026) Minor flooding is expected to continue in some flood-prone areas from Arnprior to Hawkesbury as the Rideau Valley Conservation Authority downgrades its flood warning to a flood watch.

“Spring runoff remains elevated in the northern part of the basin; however, conditions have generally stabilized,” the conservation authority wrote in an update on May 4. “As runoff from the northern basin continues to move downstream, water levels will remain elevated along the main stem of the river over the next two weeks.”