All active flood warnings for the Grand River watershed have ended, the Grand River Conservation Authority announced this week. Residents living near the river can now resume normal activities after a period of elevated water levels that began in early March.
The conservation authority terminated its combined Flood Warning and Flood Watch on March 16, 2026, downgrading the alert to a lower-level Watershed Conditions Statement for Water Safety. That statement has now also expired, meaning no flood messages remain in effect for the watershed.
The flooding crisis escalated when warm temperatures and rainfall swept across the Grand River watershed beginning March 7, 2026, following a Flood Watch issued March 5. Environment Canada had forecast between 20 and 40 millimetres of rain. The combination rapidly melted a significant snowpack and caused ice jams in some communities. The conservation authority issued a flood warning for Cambridge on March 10, particularly noting the lower Speed River would see elevated water levels and potential flooding in low-lying areas.
“High flows observed throughout the watershed as a result of warmer temperatures and rain since Saturday, March 7, have receded,” the conservation authority stated in its final message.
The Grand River Conservation Authority operates seven large dams and reservoirs throughout the 6,800 square kilometre watershed to help manage water flow and reduce downstream flooding. These structures successfully handled the surge of water during the spring melt, and no major flooding events occurred despite the significant water volume.
For residents, the end of flood messages means river levels have returned to safe, normal conditions. Recreational trails that were closed during the high-water period, including Mill Run Trail and Soper Park in Cambridge, have reopened. Residents can once again use areas near the waterway without the heightened caution that accompanies active flood advisories.
The 2026 spring melt comes 52 years after the most catastrophic flood in Cambridge’s history. On May 17, 1974, the Grand River rushed through downtown Galt at 1,490 cubic metres per second, causing $6.7 million in damage. That historic flood prompted major investments in flood protection infrastructure that have helped mitigate flooding in subsequent high-water events.
The conservation authority encourages residents to stay informed about watershed conditions through its website and social media feeds, as flooding can occur in any season.
