Environment Canada Issued Heavy Rainfall Warnings

Storms and significant rainfall are forecast across parts of Ontario and Quebec this week.

Updated on Oct. 13, 2026 in Forecasts

Heavy rain falls over a dense Canadian evergreen forest, with mist rising from a muddy forest floor. — Environment Canada issued heavy rainfall warnings for Ontario and Quebec, where a low pressure system and warm front are driving significant precipitation. AI Illustration. Upload story photo >

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Environment Canada has issued weather statements and warnings for heavy rainfall and thunderstorms impacting regions in Ontario and Quebec. Rainfall totals are expected to reach up to 60 millimetres in some affected areas.

Why it matters

A low pressure system moving eastward is driving the precipitation in Ontario, while a stationary warm front is causing sustained rainfall in Quebec. Residents should prepare for potential water accumulation on roads and in low-lying areas.

Forecasts indicate eastern Ontario could see 40 to 60 millimetres of rain, while the Bois-Francs and Eastern Townships in Quebec are expected to receive 30 to 50 millimetres. The weather systems are expected to move through these regions by mid-week.

The players

Environment Canada

This is the federal department responsible for coordinating environmental policies and issuing weather warnings across the country.

The details

The stormy conditions in Ontario are driven by a low pressure system, while Quebec's rainfall is attributed to a nearly stationary warm front. Several municipalities including Kingston, Peterborough, and Montreal are currently under various levels of weather alerts.

Tuesday, October 13, 2026: Rain and thunderstorms are forecast for Ontario and Quebec.
Tuesday evening: Stormy weather is expected to clear in Ontario.
Tuesday morning to late Wednesday night: Rainfall period for Bois-Francs and Eastern Townships.
Thursday morning: Potential end of rainfall in parts of Quebec.

Seasonal Patterns

These warnings follow the standard notification protocols established by Environment Canada's public weather alerting system. The current precipitation levels reflect seasonal shifts as low pressure systems transition across the country during the autumn months.

Residents in affected areas should monitor low-lying regions for water accumulation and exercise caution while driving on flooded roads. Ensure that emergency kits are updated as the heavy rainfall continues through Wednesday night.

The takeaway

Heavy rainfall can create immediate hazards like hydroplaning on roads and localized flooding. Property owners should clear debris from drains to help manage excess water and minimize potential damage.