Montreal is experiencing its first heat wave of 2026, with humidex values climbing and temperatures feeling above 40°C during the week of June 30 to July 6. Health officials say the extreme heat and humidity raise the risk of illness for residents, especially those most vulnerable.
The meteorological conditions this week have pushed the humidex into a high range, while temperature readings have repeatedly exceeded the 40°C mark. These measurements place the city in a rare heat category for early summer, prompting the Montreal Regional Public Health Directorate to issue alerts.
Dr. David Kaiser of the Montreal Regional Public Health Directorate noted that the combination of heat, humidity, and income‑related disparities intensifies the exposure of low‑income residents to health hazards. He explained that limited access to air‑conditioned housing and cooling resources makes certain neighborhoods more susceptible to heat‑related illnesses.
The public health directorate is monitoring the situation closely and will provide updates as conditions evolve. Authorities continue to track cases of heat exhaustion and related health impacts, focusing on communities where socioeconomic factors increase vulnerability.