Toronto Becomes Canada's Hottest Spot at 34°C
Toronto recorded a high of 34°C on June 30, 2026, making it the hottest location in Canada as the first heat wave of the year grips the region. According to Environment Canada, temperatures are expected to remain in the low-to-mid 30s through the Canada Day long weekend, with humidex values making it feel like 40°C or higher.
Heat Warnings Expand Across Ontario and Quebec
Heat warnings have been issued for much of southern Ontario and parts of Quebec, including Montreal and Ottawa. The warnings are expected to last four to five days, with little relief overnight as lows remain above 20°C. The Ontario power grid operator has put the system on alert, urging conservation to avoid blackouts.
Power Grids Under Pressure
The Independent Electricity System Operator (IESO) reported that electricity demand surged as air conditioner use spiked. IESO officials warned that rotating blackouts could occur if consumers do not reduce usage during peak hours. In Quebec, Hydro-Québec also reported record demand and urged customers to limit consumption.
Canada Day Celebrations Adapt to Extreme Heat
Canada Day parade organizers in several cities, including Barrie and Ottawa, are preparing for the heat by providing extra water stations, misting tents, and medical support. The City of Ottawa is also exploring a World Cup viewing party for the Canada-Morocco match, but officials stress that heat safety measures will be in place.
New Ontario Tenant Air Conditioning Rules Take Effect
New Ontario regulations requiring landlords to provide air conditioning in rental units came into effect on June 30. The rules mandate that indoor temperatures cannot exceed 26°C, and landlords must maintain cooling systems in working order. Tenant advocacy groups praised the move but noted that enforcement remains a challenge.
GO Train Delays Possible as Heat Warps Tracks
Metrolinx warned that GO train delays are possible due to heat-related track expansion and speed restrictions. Passengers are advised to check schedules and allow extra travel time. The agency said it is deploying extra crews to monitor tracks and respond to issues.
Health Officials Urge Precautions
Toronto Public Health reminded residents to stay hydrated, avoid strenuous outdoor activity during peak heat, and check on vulnerable neighbours. Emergency rooms have reported an uptick in heat-related illnesses, including heat exhaustion and heat stroke. The city has opened cooling centres in libraries and community centres.
Canada-Wide Heat and Weather Alerts
Beyond Ontario and Quebec, heat warnings also cover parts of British Columbia and Alberta, where temperatures are expected to reach the high 30s. In Saskatchewan, the government reported a nearly $1 billion deficit for 2025-26, but the heat wave has not prompted emergency declarations. Meanwhile, severe storms caused outages and highway closures in other regions.
