The Lower Thames Valley Conservation Authority (LTVCA) issued a Watershed Condition Statement on Tuesday afternoon as the region could see torrential downpours over the next few days.
The conservation authority's warning was prompted by a rainfall warning from Environment Canada, which called for 40 to 60 millimetres of rainfall Tuesday night through Thursday as the remnants of Hurricane Beryl pass through the region.
"Historically, remnant hurricanes tracking like this have dropped over 100 mm in some areas," LTVCA said. "The amount of rain in the forecasts will create ponding, areas of standing water and localized flooding. This rain will also cause our smaller watercourses to rise, and some could spill their banks into adjacent low-lying areas."
The conservation authority advised that should the higher amounts of rainfall materialize the McGregor Creek Diversion Channel may become operational.
Residents are warned to take extra caution over the next few days and avoid the river, ditches, and streams as the combination of slippery banks, and fast-moving water can be dangerous.