Multi-day heat warnings issued for southern Ontario this week


Published July 7, 2024 at 6:45 pm

Anthony Urciuoli/ photo

This week, a heat warning is in effect for southern Ontario, bringing dangerously hot and humid conditions.

According to Environment Canada, daytime highs are forecasted to hit 31 degrees Celsius, with humidex values ranging between 35 and 38.

Nighttime will offer little respite, as lows are anticipated to reach 20 C and above.

Here are some of the areas that will be impacted by the heat:

  • Mississauga
  • Brampton
  • Halton
  • Burlington
  • Milton
  • Oakville
  • Halton Hills
  • Hamilton
  • Durham
  • Oshawa
  • Whitby
  • Ajax
  • Clarington
  • Lincoln
  • St Catharines

Environment Canada stresses that extreme heat can impact everyone’s health, but certain groups are particularly vulnerable. These include older adults, infants and young children, pregnant individuals, those with physical or mental health conditions, and people with disabilities or mobility issues.

Residents are advised to look out for signs of heat illness, including swelling, rash, cramps, fainting, heat exhaustion, heat stroke, and the exacerbation of pre-existing health conditions.

Environment Canada says those affected by the heat warning are urged to drink plenty of water regularly, even before they feel thirsty, to decrease the risk of dehydration. Thirst is not a good indicator of dehydration.

Heat stroke is also a medical emergency. Health Canada urges anyone experiencing or witnessing symptoms such as high body temperature, confusion, the stopping of sweating, or loss of consciousness to call 911 or their local emergency number immediately.

While awaiting assistance, it is crucial to move the affected person to a cool area, apply cold water to large skin surfaces, and fan them vigorously, Environment Canada notes.

A cooler airmass is expected to arrive Tuesday night, bringing relief to most of the region.

For more information and updates, individuals are asked to visit Environment Canada’s website here

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