Maitland Conservation is replacing the Flood Watch issued on Dec. 28, 2025, with a Watershed Conditions Statement – Water Safety for all municipalities in the Maitland and Nine Mile River watershed.

Rainfall over the past 24 hours ranged from 20 to 40 mm across the watershed. River levels continue to rise, though at a slower pace than typically observed under high-intensity runoff conditions, and are expected to remain below flood stage. Current temperatures are near freezing and are forecast to drop further, which will further reduce runoff and river flows.

Municipal officials are advised to continue monitoring infrastructure and drainage for debris jams or blockages, particularly as a rapid freeze and heavy snow is anticipated. Hazardous conditions persist around all river and floodplain areas, and residents are reminded to keep pets and children way from watercourses.  Elevated water levels and fast-moving flows are expected to persist over the next few days.      

This message is in effect until 3:00 p.m. on Thursday January 1, 2026.

The Maitland Valley Conservation Authority is issuing a Flood Watch for all municipalities in the Maitland and Nine Mile River watersheds. 

A Flood Watch means that flooding is possible but not imminent or certain.  

A Colorado Low will track through Southern Ontario today, bringing warm temperatures and widespread rainfall totals of 20-40 mm, with locally higher amounts possible in the southern portions of the watershed. Temperatures are forecast to rise above freezing this afternoon and continue to increase, reaching a high near 7℃. Temperatures will then fall below freezing early Monday morning as precipitation transitions to snow.

Snowmelt combined with rainfall and frozen ground conditions will intensify runoff and may result in a rapid and strong river level response. The degree of snowmelt and runoff will remain highly uncertain due to near frozen ground conditions and the amount of rainfall that materializes, leading to a wide range of possible outcomes - from typical flooding in low-lying and flood-prone areas to more extensive flooding in some locations. Water levels are expected to rise quickly overnight, with peak flows anticipated Monday afternoon. Elevated and cresting flows may persist into Wednesday for downstream portions of the watershed. Flooding may be worsened by restricted drainage caused by snow and ice. 

Municipal officials are encouraged to check and maintain drainage systems and monitor low-lying and flood prone roads. The public is reminded that slippery and unstable streambanks, combined with fast-moving cold water, will create hazardous conditions near all watercourses.  

Maitland Conservation will continue to monitor conditions and will provide updates as required.

This message is in effect until the afternoon of Tuesday December 30, 2025.