These areas saw the most rainfall during yesterday’s storm in southern Ontario

After Saturday’s major storm, which brought severe flooding to areas across southern Ontario, Environment and Climate Change Canada has released numbers showing how much rain hit different parts of the province.

On Saturday (August 17), Environment Canada issued four weather advisories, warning of torrential rain, thunderstorms and potential tornadoes.

By the afternoon, major roadways in Mississauga were shut down, leaving many people and vehicles stranded, requiring rescue by emergency crews.

Environment Canada anticipated 100 to 200 millimetres of rain over the weekend, with the following areas recording the highest amounts:

• Mississauga’s Pearson Internation Airport—128.3 mm
• Hamilton—26.6 mm

These observations were recorded by volunteers:

• Etobicoke—34.8 mm
• Pickering—26.9 mm
• Whitby— 43.7 mm

Additionally, a tornado was confirmed yesterday by the Northern Tornadoes Project in the Ayr area of southwestern Ontario. It was given a preliminary EF1 rating, indicating wind speeds of 138 to 177 km/h, with reports of structural, vehicle, and tree damage.

Environment Canada notes that this summary may include preliminary or unofficial information and is not a complete or final report.

This wasn’t the first time the region saw large amounts of rain this summer. Just a month ago (July 16), similar weather hit southern Ontario, bringing a month’s worth of rain in just a few hours and forcing the closure of roads and parks in Mississauga.

The rainfall warning remains in effect for today (August 18), impacting the following areas:

• Mississauga
• Toronto
• Brampton
• Oakville
• Milton
• Burlington
• Hamilton
• Niagara Region
• Durham Region.

Residents are advised to remain cautious and monitor local updates.