The Grand River Conservation Authority has issued a Flood Watch for the entire Grand River watershed as a combination of warm temperatures and significant rainfall is expected in the coming days.
Forecasts indicate daytime highs nearing 20, with mild conditions continuing throughout the week.
At the same time, a weather system is expected to bring moderate to heavy rainfall throughout the week, with the heaviest precipitation likely arriving today (Tuesday).
Officials say the anticipated rain, combined with already saturated ground conditions, is expected to produce significant runoff.
This will lead to rising water levels in rivers and streams, increasing the risk of flooding in low-lying and flood-prone areas.
Municipal flood coordinators in several communities, including Grand Valley, Drayton, West Montrose, Conestogo, Brantford, Six Nations, Caledonia, Cayuga, and Dunnville, are being advised to closely monitor conditions and prepare as needed.
The GRCA notes that its reservoir system remains within normal operating levels for this time of year and will be used to help reduce the impact of downstream flooding where possible.
Beyond the risk of flooding, officials are also warning about dangerous conditions around waterways.
High flows, fast-moving water, and unstable or deteriorating ice are expected to increase safety risks significantly.
Residents are being urged to stay well back from rivers and streams and to keep children and pets away from the water.
The public is also reminded to avoid all ice-covered water bodies, as conditions are no longer considered safe.
The Flood Watch remains in effect until noon on April 7th.