“While the NPCA does not anticipate major flooding along larger watercourses, flash flooding along small and urbanized watercourses, rapid increase in water levels and localized flooding in low-lying or poorly drained areas may occur.”
An Advisory to All from the Niagara Peninsula Conservation Authority
Posted September 2nd, 2026 on Niagara At Large
Niagara, Ontario – The Niagara Peninsula Conservation Authority (NPCA) is advising the public and local municipalities of the potential for flooding within its jurisdiction in the afternoon/evening of Wednesday September 2nd into the morning of September 3rd, 2026.
This includes the Niagara Peninsula, the southeastern portion of the City of Hamilton, and the eastern portion of Haldimand County.
Unsettled weather and the risk of severe thunderstorms is expected for this afternoon and into Thursday morning. Forecasted rainfall amounts of 10 – 40 mm is expected across the watershed. Isolated thunderstorms may produce an additional 25 to 50 mm in localized areas, with total rainfall amounts potentially exceeding 85 to 90 mm in some locations.
While the NPCA does not anticipate major flooding along larger watercourses, flash flooding along small and urbanized watercourses, rapid increase in water levels and localized flooding in low-lying or poorly drained areas may occur. Current water levels are below critical elevations.
Residents are advised to stay away from creeks, rivers and other waterbodies. Water levels may rise quickly, and banks may become slippery and unstable. Children and pets should be kept away from waterways.
Property owners are encouraged to safely ensure that drainage features-such as culverts, catch basins, and ditches-are free of debris. Municipal and Regional staff are advised to inspect stormwater infrastructure and monitor known flood-prone areas.
The NPCA will continue to monitor conditions closely and issue updates as required. Current flood status information is available at:
- * https://npca.ca/flood-status<https://npca.ca/flood-status?utm_source=copilot.com>
- * https://npca.ca/stream-flow-monitoring<https://npca.ca/stream-flow-monitoring?utm_source=copilot.com>
This notice remains in effect until 12:00 PM on Thursday, September 3rd, 2026, and will be updated as conditions warrant.
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