Ottawa residents might want to trade their trick-or-treat bags for umbrellas this Halloween as the capital prepares for a substantial soaking. Environment Canada has issued a special weather statement warning of significant rainfall that could drench the city with up to 70 millimetres of precipitation.
Timing the Downpour
The rainfall is expected to begin overnight Tuesday and continue through Wednesday, potentially stretching into Halloween night. Meteorologists predict the heaviest downpours will occur during Wednesday, creating challenging conditions for commuters and potentially affecting evening festivities.
Rainfall Amounts and Regional Impact
While Ottawa could see between 40 to 70 mm of rain, surrounding areas may experience even higher amounts. Environment Canada specifically notes that regions near the St. Lawrence River could receive rainfall totals approaching 80 mm, raising concerns about localized flooding.
Driving Conditions and Safety Concerns
Heavy rainfall creates particularly hazardous driving conditions with reduced visibility and increased stopping distances. Police are reminding drivers to:
- Slow down and increase following distance
 - Ensure headlights are on
 - Avoid flooded roads and underpasses
 - Allow extra travel time
 
Halloween Preparations
The timing couldn't be more dramatic for Halloween celebrations. Parents and trick-or-treaters should prepare for wet conditions by:
- Choosing waterproof costumes or having rain gear ready
 - Selecting well-lit routes with good drainage
 - Planning indoor alternatives for traditional activities
 - Checking local forecasts before heading out
 
Environment Canada continues to monitor the system and may upgrade warnings as the event approaches. Residents are advised to stay updated through official weather channels and prepare for potentially disruptive weather conditions.