Cataraqui Conservation has extended a Flood Watch in Loyalist Township for Millhaven Creek today from south of Hwy 401 to the creek’s outlet at Lake Ontario. Some localized areas that were experiencing elevated water levels have improved but very cold temperatures forecast to begin January 23 will increase the risk of blockages and localized high-water conditions.
Weather Situation: Extremely cold temperatures with wind chill values below -18 °C starting January 23 could persist for several days, including wind chill values below -30 °C on January 24.
Risks: Lack of ice cover and exposure of the water surface to cold temperatures and/or wind chill values below -18 °C can trigger the formation of frazil ice. Frazil ice can accumulate quickly on bridge abutments, piers, and riverbanks. Consequently, water levels can rise quickly upstream of areas susceptible to frazil, or anchor ice constrictions, and may lead to localized high-water conditions or flooding in vulnerable areas.
Widespread flooding is NOT expected. However, localized flooding is possible.
Specific locations where water levels were previously reported to be high include:
- Ham Rd., near the intersection of L&A County Rd. 4 and Millhaven Rd. (L&A County Rd. 28)
- Near the intersection of Lucas Rd. and Millhaven Rd. (L&A County Rd. 28)
Residents in flood-prone or low-lying areas, historically susceptible to flooding, are advised to remove items stored in the floodplains.
If you witness flooding and/or require assistance your first point of contact is the local municipality.
Cataraqui Conservation is also urging caution around all dams (inflow and outflow channels) and fast-flowing watercourses. Respect the hazards in these areas by obeying all warning signs, and keep away from booms, buoys and barriers. Stay well back from the water’s edge above and below dams and hydroelectric stations. Creek banks and lake shorelines may be slippery, increasing the chance of falling in.
Staff will continue to monitor conditions and forecasts, and update statements as needed. This Flood Watch will remain in effect until (or updated before) Wednesday, January 28, 2026, at 11:59 PM.