The week is off to a scorching start for much of southern Quebec.
For both Monday and Tuesday, Environment and Climate Change Canada (ECCC) says maximum temperatures in the region will rise above 30 C. Montreal, Quebec and Sherbrooke will have humidex values of at least 40.
A heat warning has been in effect for the region since Saturday, with ECCC saying sweltering weather will begin cooling off as of Wednesday.
When the warning was issued, nighttime temperatures in the region were expected to surpass 20 C. That remains the case for Montreal with the expected temperatures of 22 C and 25 C on Monday night and Tuesday night respectively.
In Quebec City and Sherbrooke, nighttime temperatures will be below 20 C.
ECCC says heat warnings are issued when “very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat exhaustion.”
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Early signs of heat exhaustion can include headaches, nausea, dizziness, thirst, dark urine and intense fatigue.
If you are experiencing these symptoms, it is recommended to stop your activities and drink water. You can also consult a health-care professional or call the 811 Info-Santé health line.
Heat stroke, however, is a medical emergency requiring immediate assistance.
If someone is experiencing symptoms such as “red and hot skin, dizziness, nausea, confusion and change in consciousness,” ECCC says to call 911 and try to keep the person cool as you wait for help to arrive.
While anyone can suffer from heat illnesses, those with chronic health conditions, older people and young children can be more vulnerable.
With that in mind, the weather agency is reminding people to stay hydrated and drink lots of water, even before feeling thirsty.
It also recommends people plan any outdoor activities for the coolest parts of the days and limit exposure to sunlight and heat.
To cool down, people can take showers and should try to spend a few hours a day in an air-conditioned or cool location.
“Never leave people, especially children, or pets inside a parked vehicle. Check the vehicle before locking to make sure no one is left behind,” the agency warned.
During heat waves, the City of Montreal often extends the opening hours of many public places where people can get a reprieve from the heat, including pools, splash pads and misting fountains.
It is recommended to call ahead before heading out. More information on available amenities can be found on the city’s website.