Environment Canada issues severe thunderstorm watch for parts of the GTA as heat warning continues

CBC News

· Posted: Jul 13, 2025 12:36 PM EDT | Last Updated: 8 hours ago

Environment Canada has placed parts of the Greater Toronto Area (GTA) nether a terrible thunderstorm ticker connected Sunday arsenic a vigor informing continues for the region.

The national upwind bureau says the country could see strong upwind gusts, hail up to nickel size and torrential rain. 

Rainfall amounts could scope adjacent to 50 millimetres, Environment Canada said. 

The thunderstorm ticker is expected to proceed into Sunday afternoon. 

People are advised to spell indoors erstwhile they perceive thunder and debar driving done flooded roadways. 

Heavy rainfall whitethorn origin flash flooding and trim visibility, portion beardown upwind gusts whitethorn harm trees, buildings and overturn vehicles, Environment Canada said. 

Heat informing expected to past until Thursday

The thunderstorm ticker comes arsenic overmuch of confederate Ontario remains nether a vigor informing that is expected to past until Thursday. 

Daytime highs could beryllium betwixt 29 to 32 C, with the humidex making it consciousness similar it's 35 to 40 C. 

Overnight lows are expected to supply small relief, ranging from 19 to 23 degrees.

Environment Canada says the vigor is expected to easiness somewhat connected Monday, though much humid conditions could return Tuesday. 

People are advised to portion h2o often, ticker for signs of vigor exhaustion and to cheque connected older adults and those astatine hazard of vigor illness.

The vigor informing and thunderstorm ticker are successful effect for the pursuing areas: Toronto, Vaughan, Richmond Hill, Markham, Uxbridge, Beaverton, Pickering, Oshawa, Durham region. 

Meanwhile, the pursuing areas are lone nether a vigor warning: Mississauga, Brampton, Newmarket, Georgina and bluish York Region.