# Saint-Maurice River flood risk in Quebec

> Live situation record from CLSTR: https://clstr.news/situations/saint-maurice-river-flood-risk-in-quebec
> Updated: 2026-08-03T14:45:08.000Z. Sources: 5. Developments: 2.

In late July 2026, Hydro‑Québec reported that heavy rains in the Mauricie region pushed the Saint‑Maurice River to a record flow of about 1,400 m³/s, far above its normal summer levels. The utility opened evacuation gates at the Almaville dam and warned downstream communities, including Trois‑Rivières, to exercise extra caution.

By early August, the river’s discharge had risen further to roughly 1,560 m³/s as additional rainstorms were forecast across Quebec and parts of Ontario. Hydro‑Québec intensified monitoring, coordinated with regional civil‑security agencies, and adjusted water‑control structures to mitigate flash‑flood risks for low‑lying urban areas and infrastructure. Residents were again urged to stay away from waterways despite potentially calm surface conditions.

## Timeline

### 2026-08-03: Hydro-Québec Monitors Saint-Maurice River Flood Risk Amid Heavy Rain in Quebec

Heavy rain has swollen Quebec’s Saint‑Maurice River to over 1,500 m³/s; Hydro‑Québec is monitoring the flood risk and urging caution.

3 sources. https://clstr.news/cluster/hydro-qubec-monitors-saint-maurice-river-flood-risk-amid-heavy-rain-in-quebec

### 2026-07-31: Hydro‑Québec warns of record high flow on Saint‑Maurice River in Quebec

Hydro‑Québec says heavy rains have driven the Saint‑Maurice River to record flows of 1,400 m³/s, prompting dam gate openings and safety warnings for downstream towns.

3 sources. https://clstr.news/cluster/hydroqubec-warns-of-record-high-flow-on-saintmaurice-river-in-quebec

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Cite as: Saint-Maurice River flood risk in Quebec. CLSTR, https://clstr.news/situations/saint-maurice-river-flood-risk-in-quebec