Southern Ontario is enduring a severe heatwave, with humidex values reaching the 40s in multiple regions, prompting heat warnings and causing widespread power outages. The extreme conditions have led to cancellations and health advisories across the area.
Heat Warnings and Impacts
Environment Canada has issued heat warnings for London, Windsor-Essex, Chatham-Kent, and the Greater Toronto Area. The peak of the heatwave in Ottawa is expected today, with humidex values near 42 in Montreal. In Toronto, the extreme heat forced the cancellation of FIFA World Cup broadcasts at Nathan Phillips Square, where Portugal was set to play Croatia in the city's last 2026 World Cup match. The city cited safety concerns for attendees.
Power outages have been reported in several communities as demand for air conditioning strains the grid. Hydro One and local utilities are working to restore service, but no timeline has been provided.
Health and Safety Measures
Public health officials urge residents to stay hydrated, avoid strenuous outdoor activities, and check on vulnerable neighbors. Cooling centers have been opened in many cities. Ottawa's OC Transpo is offering free rides for youth under 18 this summer to help them reach cool spaces. In Montreal, the heat warning continues as humidex nears 42, and authorities advise limiting time outdoors.
“The heat is dangerous, especially for seniors and those with pre-existing conditions,” said Dr. Emily Carter, a public health advisor. “We recommend staying indoors during peak hours and using air conditioning if possible.”
Regional Effects
In the Maritimes, heat warnings have also been issued, with humidex values expected to reach the high 30s. Meanwhile, British Columbia faces flooding from a burst glacial lake, with the peak expected today as evacuation orders remain in place. In Alberta, Premier Danielle Smith plans a pipeline announcement, while PM Carney meets with Premier Eby in Vancouver.
The heatwave has not only disrupted daily life but also led to a spike in emergency calls. First responders are advising residents to call 911 only for life-threatening situations.
