GRCA Flood Message #7 – Combined Flood Warning and Flood Watch

The Grand River Conservation Authority (GRCA) is maintaining Flood Warning messages for West Montrose, City of Cambridge, Ayr, Brant County, Brantford, Six Nations and Haldimand County. A Flood Watch for the remainder of the Grand River watershed remains in effect.

Weather conditions

Recent rainfall, beginning on Saturday, March 7, and warm weather have melted the snowpack and have led to ice jams and flooding in some communities. While the risk of ice jams has passed, and river flows are receding, water levels remain very high. The risk of flooding remains, and municipal flood coordinators should remain vigilant. 

Previously Issued Flood Warnings Remain in Effect

Flood Warning (Action) Message for West Montrose

River flows may reach Flood Warning Zone 3 in West Montrose. Municipal flood coordinators in the Township of Woolwich have been advised to notify affected properties and monitor conditions. Residents are encouraged to refer to the guide on the GRCA’s website for information regarding flood warning zones.

Flood Warning (Action) Message for City of Cambridge

River flows are expected to increase in the lower Speed River on Thursday, March 12, and will remain elevated resulting in flooding of low-lying areas. Municipal flood coordinators in the City of Cambridge have been advised to notify affected properties and monitor conditions.

Flood Warning (Action) Message for Ayr

River flows may reach Flood Warning Zone 1 on Thursday, March 12. Municipal flood coordinators in the Township of North Dumfries have been advised to notify affected properties and monitor conditions. Residents are encouraged to refer to the guide on the GRCA’s website for information regarding flood warning zones.

Flood Warning (Action) Message for Brant County

River flows have reached Flood Warning Zone 2 on the Grand River from Glen Morris to Paris (Penman's Dam) and will remain elevated.

River flows have reached Flood Warning Zone 3 on the Grand River from Paris (Penman's Dam) to Onondaga and will remain elevated.

River flows peaked in Flood Warning Zone 2 on the Nith River in Paris and are expected to remain elevated.

Municipal flood coordinators in the County of Brant have been advised to notify affected properties and monitor conditions. Residents are encouraged to refer to the Flooding section of the County of Brant website for information regarding flood warning zones.

Flood Warning (Action) Message for Brantford

River flows peaked in Flood Warning Zone 3 on the Grand River in Brantford and are expected to remain elevated. Municipal flood coordinators in the City of Brantford have been advised to monitor conditions. Residents are encouraged to refer to the Flood Preparedness section of the City of Brantford’s website for information regarding flood warning zones.

Flood Warning (Action) Message for Six Nations

River flows are expected to remain elevated. Municipal flood coordinators in Six Nations have been advised to notify affected properties and monitor conditions.

Flood Warning (Action) Message for Haldimand County

River flows are expected to remain elevated. Municipal flood coordinators in Haldimand County have been advised to notify affected properties and monitor conditions.

Previously Issued Flood Watch Remains in Effect

Most of the snowpack across the watershed has melted from recent warm temperatures, and combined with rainfall, has increased water levels in rivers, streams, and reservoirs. The risk of flooding remains. Municipal flood coordinators should monitor areas where flooding is known to occur.

GRCA Reservoirs

The major reservoirs at Belwood, Conestogo, Guelph, Luther, Woolwich, Laurel, and Shade’s are being used to help reduce the impact of downstream flooding.

Stay safe 

High flows and unstable ice conditions will increase the safety risk around waterbodies throughout the watershed. The public is encouraged to exercise extreme caution around local waterways. Families are reminded to keep children and pets away from watercourses. The public is reminded to stay off 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 Saturday, March 14, 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:

Lisa Stocco, GRCA Director of Strategic Communications and Environmental Education
Phone 519-621-2763 x2316 | Email lstocco@grandriver.ca

Serena Catania, GRCA Supervisor of Communications and Marketing
Phone 519-621-2763 x2240 | Email scatania@grandriver.ca