Toronto’s hospitals saw a surge in emergency room visits during the recent heatwave, attributing nearly 40 cases directly to the extreme temperatures. Toronto Public Health disclosed that between June 30 and July 4, when an orange level heat alert was active, hospitals reported a total of 39 heat-related ER visits. The peak occurred on July 2, with 15 visits recorded.
The highest temperature observed during the heatwave reached 36 degrees Celsius, with a humidex reading peaking at 48. Toronto Public Health highlighted that ER data does not encompass all health impacts associated with extreme heat, such as exacerbating cardiac and respiratory conditions.
Dr. Edward Xie, an emergency physician at the University Health Network, mentioned that his facility experienced increased activity last week, although discerning direct heat-related cases from those where heat worsened existing conditions is challenging. The health authority noted similarities between last week’s hospital visits and those during a three-day heatwave in June 2025 when 42 individuals sought emergency care.
Comparisons between this year’s ER visits and those from the previous year are constrained due to variations in timing and duration, along with changes in the weather warning system by Environment Canada. Additionally, enhanced heat relief measures were implemented this year, and the Canada Day holiday might have impacted the city’s population influx.
Dr. Xie emphasized the necessity of implementing climate change policies rather than solely relying on individual preparedness to address extreme heat and its health repercussions. He underscored that addressing the root cause of heatwaves requires broader societal and political decisions, cautioning against excessive reliance on air conditioning due to potential vulnerabilities during power outages.
The escalating severity and duration of heatwaves globally are attributed to climate change fueled by fossil fuel consumption. Dr. Xie advised the public to treat heatwaves as emergencies, emphasizing the importance of staying hydrated with cool fluids while avoiding alcohol and sugary or caffeinated beverages that can induce dehydration. He also warned against the misconception that fans alone can provide relief in extremely hot rooms.
The recent heatwave coincided with public gatherings for Canada Day and World Cup events in Toronto, leading to the cancellation of World Cup match broadcasts at Nathan Phillips Square due to severe heat. Additional cooling measures were implemented for the final match at Toronto Stadium. The province was under an orange warning from Environment Canada, signaling the likelihood of severe weather causing substantial damage or health risks.