GRCA Flood Message #1 – Flood Watch (3)

Grand River Conservation Authority Flood Watch

Date and Time Issued:

Monday, March 30, 2026, at 3:30 p.m.

The Grand River Conservation Authority (GRCA) is issuing a Flood Watch message 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 

The major reservoirs at Belwood, Conestogo, Guelph, Luther, Woolwich, Laurel, and Shade’s are at normal levels for this time of year and will be used to reduce the impact of downstream flooding.

Stay safe 

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. 

For further information refer to GRCA’s website at www.grandriver.ca

  • For current river flow, refer to the “River Data” section.
  • For more information on water safety, refer to the “Learn & Get Involved / Water Safety” section.