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TORONTO, July 8, 2026 — Toronto and much of the Greater Toronto and Hamilton Area should batten down the hatches this afternoon as a Yellow Warning from Environment Canada has been issued with severe thunderstorms expected to be capable of producing damaging wind gusts, torrential rain and dangerous lightning.
The storms are expected to develop this afternoon and continue into the early evening, with some areas facing the risk of localized flooding and wind damage.
Environment Canada says the strongest storms could produce wind gusts of up to 90 km/h and localized rainfall amounts reaching 60 millimetres, particularly where multiple thunderstorms track over the same neighbourhood.
While not everyone will experience the worst conditions, localized areas that are hit by successive storms are expected to receive the highest rainfall totals.
Strong winds could cause damage
Powerful wind gusts approaching 90 km/h have the potential to damage roofs, fences, tree branches and temporary structures such as tents, gazebos and other soft shelters. Residents are encouraged to secure patio furniture, umbrellas, garbage bins and any other loose outdoor items before the storms arrive.
Heavy rain may also lead to flash flooding, especially in low-lying areas, underpasses and locations with poor drainage. Drivers should expect rapidly changing conditions and significantly reduced visibility during the heaviest downpours.
Officials are urging motorists never to drive through flooded roadways, as water depth can be deceptive and road surfaces may be washed out beneath the water.
Lightning remains one of the biggest dangers
Along with heavy rain and damaging winds, lightning will accompany many of these storms.
Environment Canada reminds residents of a simple but lifesaving rule: “When thunder roars, go indoors.” Lightning strikes kill and injure Canadians every year, even when storms appear to be some distance away.
If threatening weather approaches, Emergency Management Ontario recommends taking shelter immediately in a sturdy building or a hard-topped vehicle until the storm has completely passed.
What to expect
Timing
- This afternoon through early evening
Potential hazards
- Wind gusts up to 90 km/h
- Localized rainfall up to 60 mm
- Frequent lightning
- Flash flooding
- Reduced visibility
- Possible damage to trees, roofs, fences and temporary outdoor structures
Stay weather aware
Residents are encouraged to keep an eye on the latest forecasts and weather alerts throughout the day, as thunderstorm intensity and track can change quickly.
Anyone who observes severe weather can report it to Environment Canada by emailing ONstorm@ec.gc.ca or by posting on X using #ONStorm.
With cottage traffic, commuters and outdoor events all in full swing, it’s a good day to have a backup plan. Secure loose objects, postpone outdoor activities if storms are approaching, and seek shelter at the first sound of thunder.
The storm threat is expected to diminish later this evening as the system moves through southern Ontario.
