Southern Quebec is experiencing a heat wave with high temperatures and humidity expected to persist through Saturday, July 4, 2026 [1].
The timing of the weather event is particularly critical as it coincides with July 1, a traditional day for residential moves in the province. The combination of physical exertion and extreme heat increases the risk of heat-related illnesses for those transporting belongings.
An intense high-pressure system is driving the current weather pattern [2]. Daytime temperatures are forecast to reach between 30 °C and 33 °C [1]. When accounting for humidity, the humidex values are expected to range between 40 and 44 [1].
Health officials said the population should take safety precautions to avoid heatstroke and dehydration. Residents are advised to stay hydrated, seek shade, and use fans or air conditioning to maintain safe internal temperatures.
While some reports suggested temperatures could exceed 35 °C, primary meteorological data indicates a range of 30 °C to 33 °C [1]. The heat wave is expected to last from Wednesday, July 1, to Saturday, July 4 [1].
Those moving today should take frequent breaks and ensure they have access to plenty of water. Public health guidelines suggest limiting strenuous outdoor activity during the peak heat of the afternoon, typically between 11 a.m. and 4 p.m., to mitigate health risks [2].
“Daytime temperatures are forecast to reach between 30 °C and 33 °C”
The intersection of a severe weather event with a high-volume migration day in Quebec creates a public health vulnerability. Because July 1 is a peak day for physical labor and relocation, the risk of heat exhaustion is amplified for a large segment of the population simultaneously.
