Flood Watch in Effect
The Ottawa Valley conservation authority has issued a flood warning for Cornwall and parts of the surrounding region, as rapidly warming temperatures following this week's ice storm are accelerating snowmelt and raising water levels in local rivers and tributaries.
Residents in low-lying areas near the St. Lawrence and South Nation rivers are being urged to monitor conditions closely and take precautionary measures to protect property.
Why the Risk Is Elevated This Year
The combination of an unusually heavy late-winter ice storm and above-seasonal temperatures in the days following it has created conditions that conservation authorities describe as "elevated flood risk." A significant snowpack across the region, now melting quickly, is funnelling large volumes of water into drainage systems that may not be able to handle the load.
The ice storm earlier this week, which knocked out power to thousands of Ottawa-area homes and closed schools across Eastern Ontario, deposited additional ice and freezing rain that is now melting rapidly.
What Residents Should Do
Authorities are advising residents in flood-prone areas to:
- Clear drains and gutters of ice and debris
- Move valuable items from basements and ground floors
- Stay away from swollen rivers and streams
- Report any blocked culverts or drainage issues to their municipality
Emergency management teams in Cornwall and neighbouring municipalities are monitoring the situation around the clock.
A Recurring Concern
Spring flooding is an annual reality for many communities in the Ottawa Valley. The region's geography, with the Ottawa River and its many tributaries draining a vast watershed, means that rapid snowmelt events can quickly translate into serious flooding downstream.
In recent years, the 2019 Ottawa-area floods caused significant property damage and required large-scale emergency responses. Residents and conservation authorities have since invested in better monitoring and early warning systems, systems that are now being put to the test.
Keep an eye on updates from the South Nation Conservation Authority and the City of Cornwall for the latest advisories.
Source: CBC Ottawa
