Ottawa braces for 50 to 100 mm of rain Sunday into Monday
Environment Canada issued a yellow warning as heavy rainfall moves in, with flooding possible in low-lying areas.
Sources · local media reports
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Heavy rain is moving into Ottawa Sunday evening and may last through Monday morning, bringing 50 to 80 mm of rainfall across most of the city — but some areas could see up to 100 mm if multiple thunderstorms stack up.
Environment Canada issued a yellow warning Saturday afternoon, cautioning residents to prepare for potential flooding and pooling in low-lying areas. The heaviest rainfall is expected Sunday evening, though some parts of Eastern Ontario may see rain persist into Monday morning.
The city is urging residents to avoid driving through flooded roadways. Standing water can hide road damage and sweep vehicles off the pavement even in shallow flood conditions. Residents should also clear storm drains and gutters near their properties to help water drain properly.
This follows severe weather patterns that have affected the region repeatedly over the summer. As HighOnCity reported in July, strong storms brought wind gusts exceeding 100 km/h to the area.
The facts
How much rain is expected in Ottawa?
Ottawa will receive 50 to 80 mm of rainfall across most of the city, though some areas could see up to 100 mm if multiple thunderstorms stack up.
When will the heavy rain hit Ottawa?
Heavy rain will move into Ottawa on Sunday evening, August 3, 2026, and may last through Monday morning, August 4, 2026, with the heaviest rainfall expected Sunday evening.
What warning did Environment Canada issue?
Environment Canada issued a yellow warning on Saturday afternoon, August 1, 2026, cautioning residents to prepare for potential flooding and pooling in low-lying areas.
What should Ottawa residents avoid during the rainfall?
Residents should avoid driving through flooded roadways, as standing water can hide road damage and sweep vehicles off the pavement even in shallow flood conditions.
