Notice

Wet weather system moves through Mississauga

Weather system will bring showers, gusty winds and thunderstorms.

Emergency and public safety | May 19, 2026

Driving in the rain

A series of thunderstorms moving eastbound through Mississauga sometime between 6 to 8 p.m. tonight bringing localized heavy downpours, strong winds (90-110km/h), and lightning/thunder. Hail is also possible, and total rainfall amounts are difficult to predict with certainty, but are expected to be between 20-40mm.

Heavy rain may lead to flooding, fast‑moving water, and slippery banks and shorelines. For safety, residents are urged to avoid rivers, creeks, stormwater ponds and Lake Ontario. Short periods of intense rainfall can also overwhelm storm drains, leading to rapid water pooling on roads and in low‑lying areas.

Reminders

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.

City response

The City is monitoring local waterways and low‑lying areas.

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).

Stay prepared

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.

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, or the WeatherCAN app from Environment Canada for details on weather conditions.

Learn more about flooding in Mississauga.

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Media contact

City of Mississauga Media Relations
media@mississauga.ca
905-615-3200, ext. 5232
TTY: 905-896-5151
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