Environment Canada has issued a special weather statement for Brockville and the surrounding area, warning of heavy rainfall expected this weekend. Residents should prepare for 25 to 50 mm of rain starting Saturday, April 4, 2026, with the most intense downpours anticipated throughout Saturday evening and overnight.
The rainfall is being driven by a weather system known as a Colorado low. Meteorologists note there is still some uncertainty regarding exactly where the highest rainfall totals will occur, and additional rainfall warnings may be issued as the storm approaches. Thunderstorms may also develop, which could lead to even higher amounts of rain in some areas.
The Cataraqui Region Conservation Authority monitors the watershed in the region and works to protect residents from natural hazards like flooding. Because Brockville is recognized as one of the most flood-prone cities in Ontario, officials advise those living in low-lying or historically vulnerable areas to monitor conditions closely over the coming days.
The city has a history of significant flooding, notably in 2017 and 2019, when water levels on the St. Lawrence River and Lake Ontario caused issues for roads, buildings, and local docks. For those looking for resources on how to prepare for potential flooding, information is available at Ontario.ca/floods.
