Environment Canada issued a heavy rainfall warning Tuesday morning for much of southern Ontario, including Waterloo Region.
The agency said we could see as much as 100 mm of rain, with rates of up to 40 mm per hour.
They also warned of thunderstorms and washouts near creeks and rivers.
The Grand River Conservation Authority (GRCA) also issued a flood advisory Tuesday as water levels continue to increase throughout the watershed.
According to the agency, heavy rainfall last week created “saturated soil conditions, making the watershed very reactive to further rain.”
They reported that parts of the watershed have received 60 mm of rain during the past 24 hours and another 10 to 20 mm of rain is in the forecast for the rest of the day.
The GRCA warns of flooding “in low lying areas near watercourses and in urban areas, if drainage systems are overwhelmed.” The advisory will …