Da: 27/07/2026, 16:30
A: 28/07/2026, 12:00

This notice is intended to advise the public and local municipalities of the status watercourse and Great Lakes conditions within the Niagara Peninsula and the eastern portions of the City of Hamilton and Haldimand County. There is a risk of severe thunderstorms capable of producing torrential rainfall - between 50 - 75 mm - arriving this evening and into tomorrow morning. Given the instability of storm behaviour during this time of year, there remains some uncertainty as to where the highest rainfall amounts will be. While the NPCA does not anticipate major flooding along larger watercourses, flash flooding in urbanized and low-lying areas is likely to occur. Overland surface runoff may also occur in flat, poorly drained rural areas - typically within floodplains - during intense rain events when culverts and ditches become overwhelmed and force water to spread outside of defined channels. This notice remains in effect until 12:00 PM on Tuesday, July 28th, 2026, and will be updated as conditions warrant.

Da: 28/07/2026, 00:05
A: 28/07/2026, 06:00

Yellow warning - rainfall - in effect Heavy rain is expected. What: Heavy rainfall with amounts of 50 to 100 mm When: Ending before dawn this morning. Additional information: Thunderstorms will continue to move through the area bringing heavy rainfall. ### Water will likely pool on roads and in low-lying areas. For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit https://www.ontario.ca/page/floods for the latest details. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to [email protected] or post reports on social media using #ONStorm.