Select a watershed (basin) within the map below to learn more about the IJC’s water-related activities.
Lake Ontario and the upper St. Lawrence River Flood Risk Diminishes; Very High Outflows to Continue
The risk of flooding on Lake Ontario and the upper St. Lawrence River has declined from moderate in December 2020 to low. In December, the risk analysis indicated a 28% chance of water levels exceeding a threshold at which damages occur in many shoreline communities. The risk is now down to 8%. There is a comparable risk of flooding on Lake St. Louis in the lower St. Lawrence River.