Environment Canada has issued a rainfall warning for Port Colborne, Ontario, for Wednesday, March 11, 2026. The region is expected to receive between 20 and 40 mm of rain, which may cause localized flooding in low-lying areas.
The weather alert explains that because the ground is currently frozen or heavily saturated, it has very little ability to soak up the rain. This increases the chances of water pooling on roads and creating dangerous driving conditions.
Safety officials advise residents to avoid driving through any flooded roadways and to stay away from low-lying spots. It is also important to watch for washouts near rivers, creeks, and culverts where the ground might give way.
The Niagara Peninsula Conservation Authority is monitoring water levels as this storm system moves through southern Ontario. If thunderstorms occur, some areas could see even higher amounts of rainfall than originally predicted.
Residents are encouraged to check for weather updates throughout the day. This rainfall is part of a larger weather pattern affecting the region during the typical spring thaw period.
