Emergency Management OntarioEnvironment Canada

Environment Canada ends thunderstorm warnings for parts of GTHA after storms brought strong winds, large hail, heavy rain; agency urged 'When thunder roars, go indoors'

Environment Canada has lifted thunderstorm warnings for parts of the Greater Toronto and Hamilton Area after severe storms brought strong winds, large hail, and heavy rain. The agency advised residents to seek shelter during storms, emphasizing, 'When thunder roars, go indoors.'

CTV News CTV News9 August 2026 · 00:31 UTC
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Environment Canada has concluded thunderstorm warnings for the Greater Toronto and Hamilton Area after severe weather brought damaging conditions. The agency had previously warned of wind gusts reaching 90 km/h and quarter-size hail, which could lead to power outages.1346

Residents were advised to secure loose objects and seek shelter indoors as storms approached. The agency emphasized, “When thunder roars, go indoors,” highlighting the dangers of lightning, which poses a significant risk to Canadians each year. Both Environment Canada and Emergency Management Ontario recommend immediate cover during severe weather, including thunderstorms, to protect against flying debris and hail.5

The storms prompted widespread concern, with the potential for heavy rainfall compounding the risks associated with high winds and hail. The agency's warnings reflect the unpredictable nature of summer storms in the region, urging residents to remain vigilant and prepared for sudden weather changes.2

Key Insight
“The storms could produce wind gusts up to 90 km/h and quarter-size hail, with potential power outages. Both Environment Canada and Emergency Management Ontario recommend taking cover immediately if severe weather approaches.”
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“Several thunderstorm warnings and watches issues by Environment Canada for parts of the Greater Toronto and Hamilton Area on Saturday have ended.”
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