Residents in Waterloo, Ontario, are facing a risk of localized flooding as an extreme cold snap on March 2, 2026, is forecast to turn into a rapid thaw with rain later in the week.
Environment Canada issued a warning for extreme cold on Monday morning, with wind chills reaching as low as -30. Temperatures are then expected to climb significantly throughout the week, reaching a high of 10°C by March 7, 2026.
The Grand River Conservation Authority is monitoring the river for ice jams, which can cause water levels to rise quickly and without warning. A 60 per cent chance of rain on March 5, 2026, is expected to speed up the ice breakup and snow melt. This transition can lead to unpredictable flooding in low-lying areas near the river and local creeks.
High-priority areas for alerts include the Laurel Creek floodplain and the Walter Bean Grand River Trail. The City of Waterloo suggests that residents move valuables out of their basements if they live in flood-prone zones. People are also encouraged to clear snow and trash from catch basins near their property to help water drain away and prevent street flooding.
