Residents in Oshawa, Ontario, are being told to prepare for heavy rain on Wednesday, March 11, 2026, as a weather warning is in effect. Environment Canada issued a rainfall warning for the area, predicting between 20 and 40 mm of rain throughout the day.
The risk of flooding is high because the ground is currently frozen or soaked from previous weather. This means the soil cannot soak up the new rain, which will likely lead to water pooling on roads and in low-lying spots.
Localized flooding and washouts could happen near rivers, creeks, and culverts. The Central Lake Ontario Conservation Authority is currently watching the water levels in the local watershed to track potential flood threats.
Drivers are reminded not to go through flooded streets and to stay away from low-lying areas where water might collect quickly. Thunderstorms are also possible, which could bring even higher amounts of rain to some parts of the community.
