Environment Canada has issued a severe thunderstorm watch for Toronto as heat warning remains in effect.

The national weather agency says conditions are favourable for the development of severe thunderstorms, which could produce strong wind gusts, large hail and heavy rain.

“Thunderstorms may quickly develop over the area today,” Environment Canada said in its advisory.

“Local utility outages are possible. There is a risk of injury.”

Downed trees and power lines blocked some roads and damaged property in Newmarket following a “significant weather event,” York Regional Police said, noting that they received multiple calls.

Videos shared with CP24 show vehicles dodge a large tree on Bathurst Street, south of Mulock Drive. The tree also toppled down utility lines.

Downed tree A downed tree is blocking a lane on Bathurst Street south of Mulock Drive in Newmarket on Friday, July 3, 2026. (John Kohler)

Meanwhile, the city continues to bake under the “long-duration heat event.” As of 3 p.m., the city has reached a high of 34.7 C with a humidex of 44.

Environment Canada says hot conditions are expected to last until Saturday.

For anyone going to outdoor watch parties to see Canada’s Round of 16 match against Morocco, it will be a mix of sun and cloud on Saturday with 40 per cent chance of showers and a high of 31 C.

There will be some relief on Sunday with a high of 26 C, cloudy conditions and a 30 per cent chance of showers.