A weather system is moving through Mississauga today, bringing heavy rain this evening and continuing overnight.
Emergency and public safety | April 4, 2026
Heavy rainfall is expected in Mississauga today is expected to see rainfall anywhere between 20-40 millimetres. Thunderstorms are possible which could result in higher rainfall amounts. The heaviest rain is expected to fall this evening and tonight.
Water levels in local waterways, including creeks, rivers, ponds and lakes remain high, increasing the risk of additional flooding. The ground may have little ability to absorb further moisture due to recent rainfall events. Heavy rainfall may result in flooding, fast-moving water, and slippery banks and shorelines. For your safety, please avoid rivers, creeks, stormwater ponds and Lake Ontario, as water levels remain high.
Heavy rain in a short period of time can overwhelm storm drains and cause water to pool quickly on roads and in low-lying areas.
Residents are reminded to please clear storm drains near driveways and in backyards of leaves and debris to reduce the risk of flooding. Residents are also encouraged to prepare in advance and take extra care when travelling.
Drivers are reminded to slow down on roadways, maintain a safe distance, leave extra time for travel and drive according to weather conditions. Refrain from driving through flooded roadways. If there is pooling water on a roadway, which make lanes impassable, avoid driving through it. Divert, turn back and find another route.
Avoid low-lying areas. Watch for washouts near rivers, creeks and culverts.
The City is monitoring local waterways and low‑lying areas in co-ordination with conservation authorities as part of the Credit Valley Conservation (CVC) Flood Outlook.
City crews are actively monitoring and maintaining storm drains (catch basins) on city roads to watch for water ponding and flooding. Report a problem with a storm drains on the road online or by calling 311 (905-615-4311 outside City limits).
Conservation Authorities, like CVC, issue these watches and warnings when conditions like heavy rain, melting snow or ice buildup could lead to rising water levels.
If a flood warning has been issued, act immediately to protect yourself from danger and your home from flood damage.
New: Colour-coded weather alerts
Spring brings a mix of rapid snowmelt, heavy rain and breaking ice, leading to a higher flood risk. These can all cause water to build up faster than the ground and drainage systems can handle.
For any questions or concerns about flooding, please contact 311.
Please continue to monitor the City of Mississauga Newsroom for updates. Please follow @citymississauga, @saugaparksrec, @CVC_CA and @TRCA_HQ, on X.
Check the weather on the Weather Network, Credit Valley Conservation or the WeatherCAN app from Environment Canada for details on weather conditions.
Keeping a close eye on changing weather conditions, preparing your family and maintaining your home can make a big difference. A little preparation now can help protect both your loved ones and your property as temperatures rise.
Learn more about flooding in Mississauga.
City of Mississauga Media Relations
media@mississauga.ca
905-615-3200, ext. 5232
TTY: 905-896-5151
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