On March 11, 2026, Environment Canada issued a rainfall warning for Brockville, Ontario, as a mix of freezing rain and heavy downpours threatens the community. The region is expected to receive between 20 to 40 mm of rain throughout the day, creating hazardous conditions for residents and travelers. This alert comes as an existing freezing rain warning remains in effect for the local area.
Before the heavy rain arrives, the city is expected to see a period of freezing rain lasting several hours. Forecasters predict that 2 to 5 mm of ice will build up on roads, sidewalks, and parking lots, making them very slippery. These icy conditions may also lead to utility outages if the weight of the ice affects local power lines.
The transition to heavy rain poses a specific risk because the ground in the region is currently frozen or already soaked with water. Since the soil cannot absorb the rainfall, the water is likely to pool on roads and overflow in low-lying areas. Officials are warning drivers not to travel through flooded roadways and to stay away from areas where water has collected.
Residents should also keep a close watch for potential washouts near rivers, creeks, and culverts as the water volume increases. If thunderstorms develop, some neighborhoods could see even higher amounts of rain than originally predicted. Community members are encouraged to monitor updates from local conservation authorities and the Ontario Ministry of Natural Resources regarding flood risks.
Hazardous travel conditions are expected to persist as the weather shifts from ice to heavy rain. Public safety officials advise residents to stay informed through official weather alerts and to plan for extra travel time if they must be on the roads.
