GRCA Flood Message #1 – Flood Watch

The Grand River Conservation Authority (GRCA) is issuing a Flood Watch for the entire Grand River watershed.

Weather forecast

Warm weather is expected today, with daytime highs just below 20 °C. This warming trend will continue into tomorrow, with temperatures reaching similar levels. Current forecasts indicate moderate to heavy precipitation throughout the week, with the majority expected tomorrow, including a risk of thunderstorms. While projected totals vary, most forecasts call for 50 to 60 mm of rain over the next few days.

Flood Watch for the entire Grand River watershed

The forecasted rainfall is expected to generate significant runoff, leading to rising water levels. As a result, this event will increase the potential risk of flooding in areas typically prone to flooding. Municipal flood coordinators in Grand Valley, Waldemar, Drayton, West Montrose, the Village of Conestogo, New Hamburg, Ayr, Brantford, Six Nations, Caledonia, Cayuga and Dunnville should be aware of these conditions and take appropriate precautions.

GRCA Reservoirs

GRCA reservoirs are within their normal operating range for this time of year and will be used to reduce the impact of downstream flooding.

Public safety

High flows and unstable ice conditions will increase the safety risk around rivers and streams throughout the watershed. The public is encouraged to exercise extreme caution around all local waterways. Families are reminded to keep children and pets away from all watercourses. The public is reminded to stay off any ice-covered waterbodies, due to unsafe conditions.

River conditions and forecasts are being monitored closely, and any additional flood messages will be issued as needed.

This message will remain in effect until 12 p.m. on Tuesday, April 7, 2026. 

More information

• For more information on flows, weather and reservoir conditions see the River Data section of the GRCA website.
• More information on the flood warning system is available on the GRCA website.
• Receive GRCA flood messages by e-mail by subscribing through the GRCA website.
• Follow GRCA flood messages on X at grca_flood_msg.
• More information about how the GRCA’s role in managing floods is available in the Flooding section of the website.
• Copies of the GRCA’s River Safety Rules booklet is available by contacting the GRCA Administration Centre

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Media contacts:

Serena Catania, GRCA Supervisor of Communications and Marketing

Phone 519-621-2763 x2240 | Email scatania@grandriver.ca

Lisa Stocco, GRCA Director of Strategic Communications and Environmental Education

Phone 519-621-2763 x2316 | Email lstocco@grandriver.ca