Weather system could bring heavy rain and thunderstorms to Mississauga

A weather system moving through southern Ontario is expected to bring additional rainfall and thunderstorms to Mississauga this afternoon and evening.

The Toronto and Region Conservation Authority (TRCA) and Credit Valley Conservation (CVC) are advising residents to prepare for changing weather conditions. For safety, residents are urged to:

• Stay away from rivers, creeks, stormwater ponds and Lake Ontario.
• Avoid low-lying areas that may flood quickly.
• Watch for washouts near culverts and bridges.

With soils already saturated and water levels elevated, rivers, streams and stormwater systems may respond quickly to additional rainfall.

Flooding and high water levels remain a concern

TRCA advises that river and stream water levels are already high and are expected to continue rising over the next 24 hours. Watercourses have not yet reached their peak levels and stronger, faster flows are expected throughout the day and into tomorrow.

Heavy rainfall in a short period of time may result in:

• Localized flooding and flash flooding.
• Water pooling on roads and in low-lying areas.
• Rising water levels in rivers, streams and stormwater ponds.
• Hazardous conditions near bridges, culverts, dams and shoreline areas.

What is a flood outlook, watch or warning?

Flood messages are issued by conservation authorities to help residents understand changing conditions and take appropriate action.

• Flood outlook: Early notice of the potential for flooding.
• Flood watch: Flooding may happen in certain areas.
• Flood warning: Flooding is happening or will happen soon.

If a flood warning has been issued, act immediately to protect yourself from danger and your home from flood damage.

Driving and outdoor safety

Heavy rain and thunderstorms can create hazardous conditions for motorists, cyclists and pedestrians.

Residents are reminded to:

• Allow extra time for travel and slow down.
• Leave extra space between vehicles.
• Drive according to road and weather conditions.
• Never drive through flooded roadways or pooled water.
• Turn around and find another route if roads become impassable.
• Watch for fallen branches, debris and reduced visibility during storms.

Pedestrians and cyclists should also take extra care, as wet and windy conditions can make surfaces slippery and reduce visibility.

How residents can prepare

Small steps can help reduce flooding risks and improve safety during severe weather.

Residents are encouraged to:

• Clear leaves and debris from storm drains near their home.
• Check downspouts and ensure water drains away from foundations.
• Secure patio furniture, umbrellas, garbage bins and other loose outdoor items that could be affected by strong winds.
• Charge mobile devices in case of power outages.
• Ensure an emergency kit is ready and accessible.
• Monitor weather forecasts and conservation authority updates throughout the day.

City response

The City of Mississauga is monitoring weather conditions and local waterways.

City crews will monitor and maintain storm drains on city roads and respond to reports of water ponding or flooding.

Residents can report storm drain issues online or by calling 311 (or 905-615-4311 from outside city limits).

The City’s Office of Emergency Management will continue to monitor conditions with conservation authority and weather partners.

Stay informed

Weather conditions can change quickly. Residents are encouraged to:

• Monitor local forecasts on the Weather Network or the WeatherCAN app from Environment and Climate Change Canada.
• Follow @citymississauga, @saugaparksrec, @CVC_CA and @TRCA_HQ on X for updates.
• Continue to check the City of Mississauga Newsroom for updates.

For questions or concerns related to flooding, contact 311.

Tags

• Emergency and Preparedness
• Public Safety
• Weather Conditions and Warnings