Toronto

Here is a list of the Ontario cities that saw the most rain during Wednesday’s storm

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Drivers stranded under flooded Toronto underpass rescued by police

Drivers stranded under flooded Toronto underpass rescued by police

Driver pushes stranded car from flooded Toronto streets

Driver pushes stranded car from flooded Toronto streets

Floodwaters flow over floor of a TTC bus during thunderstorm

Floodwaters flow over floor of a TTC bus during thunderstorm

Cars trapped on flooded streets after severe thunderstorms hit Toronto

Cars trapped on flooded streets after severe thunderstorms hit Toronto

Hail bounces off roof of vehicle driving through Toronto traffic

Hail bounces off roof of vehicle driving through Toronto traffic

Timelapse shows 'dangerous thunderstorm' descend on the Toronto skyline

Timelapse shows 'dangerous thunderstorm' descend on the Toronto skyline

Caledon and Vaughan were among the hardest-hit communities in Ontario when thunderstorms swept across the region Wednesday, as both areas saw more than 130 millimetres of rain.

The latest figures from Environment Canada shows just how uneven the rainfall was, with several communities recording more than 80 millimetres.

Here’s a full list of which cities got hit the worst.

1. Caledon - 138.9 mm

Caledon recorded the highest rainfall total, according to Environment Canada, with 138.9 millimetres reported by a volunteer observer.

2. Vaughan - 133.0 mm

Vaughan came in second with 133 millimetres of rain.

The city was also among communities like Toronto where Environment Canada noted widespread flooding following the storms.

3. North York - 118.1 mm

North York recorded 118.1 millimetres, making it the third-highest total in the province-wide summary.

The area was also hit by some of the storm’s largest hail, with reports ranging from 2.5 to 6.5 centimetres.

Large-sized hailk Hail about the size of a ping-pong ball has been spotted throughout the Greater Toronto Area on Wednesday, Sept. 2, 2026. (Mary Nersessian/Michael Campoli)

4. Mitchell - 107.4 mm

Mitchell. Ont. located near Kitchener, Ont.,recorded 107.4 millimetres of rain, according to a volunteer observation.

5. Scarborough - 105.9 mm

Meanwhile, in Toronto’s east-end, Scarborough rounded out the top five with 105.9 millimetres.

At one point during the storm, major flooding was reported on Scarborough Golf Club Road, where a stretch of the road is currently under construction.

One resident told CTV News the road has been under construction for years, but conditions this year have been particularly bad.

Scarborough flood (CP24)

“I think it’s a dangerous situation, right? It’s impacting travelling, going here, going there,” the resident said.

“Whenever the rain happens, this flooding happens here.”

The rainfall was part of a storm system that brought widespread flooding across parts of the Greater Toronto Area.

6. Thornhill - 93.2 mm

Thornhill recorded 93.2 millimetres.

7. Bolton - 92.5 mm

Bolton saw 92.5 millimetres of rainfall.

8. Wellesley - 83.6 mm

Wellesley, Ont., recorded 83.6 millimetres.

9. Newmarket - 82.9 mm

Newmarket saw 82.9 millimetres of rain.

10. Stouffville - 73.2 mm

Stouffville recorded 73.2 millimetres, rounding out the top 10.

More rainfall totals

  • St. Thomas: 72.9 mm
  • Courtice: 72.1 mm
  • Markham: 69.9 mm
  • Richmond Hill: 69.4 mm
  • Ottawa: 67.3 mm
  • London: 66.6 mm
  • North Stormont: 64.0 mm
  • Mississauga: 62.5 mm
  • Keswick: 59.1 mm
  • Guelph: 58.6 mm
  • Kawartha Lakes: 58.6 mm
  • Egbert: 56.5 mm
  • Oakville: 56.4 mm
  • Waterloo: 52.8 mm
  • Kitchener: 51.9 mm