Grand River Conservation Authority (GRCA) issued a flood watch for the entire Grand River watershed on Monday, March 30, 2026.
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 12:00 p.m. on Tuesday, April 7, 2026.
