Rain Expected Tonight in Mississauga

A weather system is moving through Mississauga today, Wednesday, March 11, bringing heavy rain and a chance of flooding.

*Updated as of 2:30 p. m. on March 11, 2026

Mississauga is set to experience rainfall amounts ranging from 20 to 40 millimetres. Another round of rain is forecasted for this afternoon before it starts to ease off this evening.

Water levels in local streams, rivers, ponds, and lakes are already high, raising the risk of further flooding. With the ground still partly frozen and saturated with water, it will be hard for any additional rain to soak into the soil.

Intense rainfall could lead to flooding, swift currents in waterways, and slippery banks along shorelines. For your safety, please steer clear of rivers, creeks, stormwater ponds and Lake Ontario while water levels remain elevated.

Current park flooding in Mississauga

Sawmill Valley Trail (between Erin Mills Parkway and Sawmill Valley Drive, north of Burnhamthorpe Road W) is closed to the public until further notice.

Flooding at Sawmill Valley Trail – March 11, 2026Location of flooding at Sawmill Valley Trail – March 11, 2026

Residents are asked to please clear storm drains near driveways and backyards from leaves and debris to help reduce the flood risk.

Homeowners should also get ready in advance and exercise caution while traveling.

Drivers need to slow down on roads, keep a safe distance from other vehicles, allow extra time for their trips and drive based on weather conditions. Avoid driving through flooded areas. If you encounter standing water on a roadway that makes lanes impassable, don’t attempt to drive through it. Redirect your route or turn back instead.

Stay away from low-lying areas. Watch out for washouts around rivers, creeks and culverts.

City response

The City is keeping an eye on local waterways and low-lying regions in coordination with conservation authorities as part of the Credit Valley Conservation (CVC) Flood Warning system.

City teams are actively monitoring storm drains (catch basins) on city streets for signs of water pooling or flooding. You can report issues with storm drains on roadways online or by calling 311 (905-615-4311 outside City limits).

What is a flood watch or warning?

Flood watch: There’s a possibility that flooding may occur in certain areas. Flood warning: Flooding is currently happening or will happen shortly.

Conservation Authorities like CVC issue these alerts when factors such as heavy rain or melting snow could lead to rising water levels.

If there’s a flood warning issued, act right away to protect yourself from harm and your property from flood damage.

Higher flood risk in spring

The arrival of spring brings together rapid snowmelt along with heavy rains which increases the chances of flooding. These elements can cause water accumulation faster than what drainage systems can handle.

If you have any questions or concerns about potential flooding situations, please reach out to 311.

Please continue checking the City of Mississauga Newsroom for updates. Follow @citymississauga, @saugaparksrec, @CVC_CA and @TRCA_HQ on X for more information.

You can check weather updates via the Weather Network or Credit Valley Conservation websites or use the Weather CAN app by Environment Canada for current weather conditions.

Stay prepared

Paying attention to changing weather patterns while preparing your family and home can significantly help during the spring thaw period. A bit of planning now can safeguard both your loved ones and property as temperatures start rising.

You can find more information about flooding issues in Mississauga here.

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Media contact

City of Mississauga Media Relations
media@mississauga. ca
905-615-3200 ext. 5232
TTY: 905-896-5151
Get email updates here!

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