Environment Canada says the humidex could reach 43 degrees in “highly urbanized areas in and around the city of Montreal.”
The health risks from extreme heat are greater for older adults, infants and young children, pregnant people, people with physical and/or mental illnesses, and people with disabilities or mobility issues.
The public is advised to drink plenty of water regularly and to do so even before one feels thirsty in order to decrease the risk of dehydration.
Those in an overheated area are advised to seek a cool place such as a tree-shaded area, splash pad, misting station, or air-conditioned spot like a public building. The early signs of heat illness include feeling unwell, fatigue, thirst and headache – symptoms that can rapidly evolve into life-threatening emergencies. Move to a cooler environment immediately, such as a shaded or air-conditioned space.