Severe thunderstorm watch for Toronto has ended

Environment Canada says a heat warning still remains in effect for Toronto after ending a severe thunderstorm watch for the city early Monday evening.

City remains under heat warning with humidex values expected to reach 40, Environment Canada says

Environment Canada has issued a heat warning for Toronto. (John Rieti/CBC)

Environment Canada says a heat warning still remains in effect for Toronto after ending a severe thunderstorm watch for the city early Monday evening.

Humidex values are expected to reach 40 as a "heat event" in the city is expected to continue throughout the evening, the weather agency said.

A cold front is expected to move through the Toronto area later in the evening, bringing an end to the heat event. 

Mark Schuster, a senior meteorologist for Environment Canada who is based in Toronto, said Monday the warm air that has brought the heat and humidity to Toronto is from the United States.

The cold front is what brought the risk of thunderstorms, he added.

Severe thunderstorm warning also ended

The city was also under a severe thunderstorm warning but that ended late Monday afternoon. The height of the storm brought down several tree branches in Toronto.

Nearly 2,000 Toronto Hydro customers in Scarborough were affected by a power outage that began shortly after 3 p.m.

Jean Hilscher said she anticipated the rain but not the strong winds that came in Monday afternoon. Several tree branches were downed near her Scarborough home. (Submitted by Jean Hilscher)

The company said the outage was due to damaged equipment and crews waited for the rain to clear up to be able to use bucket trucks to begin the repairs. Toronto Hydro said just before 8:30 p.m. that power had been restored to affected in Scarborough.

Fallen tree branches caused another outage just before 5 p.m. in north Etobicoke, leaving 600 customers without power. The utility company said at 9:41 p.m. that it restored power to all those affected in Etobicoke. 

Toronto's Pearson International Airport said Monday afternoon that the weather impacted flights. Passengers were asked to check with their airline for delays and cancellations.

Unsettled weather on its way

Schuster said the city should see a low of 19 C on Monday night.

On Tuesday, the high temperature is forecast to be 26 C, with a low of 19 C at night, and the weather is expected to remain unsettled with the threat of thunderstorms continuing. The unsettled weather is due to the cold front that is heading to Toronto.

Environment Canada issued a severe thunderstorm watch and a severe thunderstorm warning for the city on Monday. (James Wilson/Twitter)

On Wednesday, the high temperature is forecast to be 25 C, with a low of 17 C at night.

Temperatures are forecast to be near or slightly above normal after the cold front moves through.

Environment Canada issues severe thunderstorm watches when storms are likely to produce one or more of the following: large hail, damaging winds, torrential rainfall.

Extreme heat yet to break records

The current heat warning was first issued on Saturday to highlight the extreme heat on Sunday and Monday, Schuster said.

No records were broken at Pearson airport due to the extreme heat this weekend.

A heat warning remains in effect for Toronto on Monday but a cold front is expected to move through the city on Tuesday. (Charlie Riedel/Associated Press)

Toronto residents are urged to keep cool by not overdoing it outside while the weather remains hot.

"If you can, try to minimize your time outdoors, particularly between the hours of 10 a.m. and 4 p.m., which are usually the hottest hours of the day," Schuster said.

"And if you must be outside, make sure to wear sunscreen and drink plenty of water."

Spending time in air-conditioned places indoors is also a good idea, he said.

Schuster said Toronto has had 23 days this summer where the temperatures has been 30 C or higher. There were three such days in May, five in June, 12 in July and three so far in August.