rainfall warning in effect Rain, at times heavy, is expected. What: Total rainfall amounts of 50 to 75 mm. Amounts in excess of 75 mm are possible for areas that receive multiple thunderstorms. When: This evening through Sunday. Additional information: Showers, at times heavy, and thunderstorms are expected to move through northwestern Ontario ahead of a low pressure system. The significant rainfall will move from southwest to northeast, with multiple rounds of heavy showers possible for some areas, before tapering off late Sunday. For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit Ontario.ca/floods for the latest details ### Heavy downpours can cause flash floods and water pooling on roads. Localized flooding in low-lying areas is possible. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm. Watch for possible washouts near rivers, creeks and culverts.