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High heat and humidity to start the weekend in Southern Ontario

  • Writer: Kyle Brookings
    Kyle Brookings
  • 1 day ago
  • 2 min read

Hot and humid weather is continuing across Southern Ontario with daytime high temperatures of 32 to 35 degrees. Overnight lows are providing no relief with temperatures only dipping between 20 to 22 degrees Celsius.


Humidex values during the day will reach above 40 in some areas.


This event is expected to end on Sunday; however, temperatures will once again climb into the 30-degree range by mid next week.


Saturday's Forecast

Ottawa: Sunny. High 28.

Kingston: Risk of a thunderstorm. High 28.

Toronto: Risk of a thunderstorm. High 29.

London: Risk of a thunderstorm. High 30.

Windsor: Risk of a thunderstorm. High 31.

Forecast confidence:

High

 

Impact scale:

Moderate


Extreme heat can become dangerous quickly. Here are some important safety tips:


Stay Hydrated

  • Drink water regularly, even if you don’t feel thirsty

  • Avoid too much caffeine or sugary drinks

  • During heavy activity outdoors, take frequent water breaks

Stay Cool Indoors

  • Use air conditioning if possible

  • Close blinds or curtains during the hottest part of the day

  • Use fans, but remember that fans alone may not prevent heat illness in extreme temperatures

Avoid Peak Heat

The hottest part of the day is usually between 11 a.m. and 4 p.m.

  • Limit strenuous outdoor activities during this time

  • Schedule exercise or yard work early morning or evening

Dress for the Heat

  • Wear lightweight, loose-fitting, light-coloured clothing

  • Use a wide-brimmed hat and sunscreen outdoors


Never Leave People or Pets in Vehicles

Temperatures inside a parked car can rise dangerously fast — even with windows cracked open.


Watch for Heat Illness

Signs of heat exhaustion:

  • Heavy sweating

  • Dizziness

  • Weakness

  • Nausea

  • Headache

Move to a cool place and drink water.


Signs of heat stroke (medical emergency):

  • Confusion

  • Fainting

  • Very high body temperature

  • Hot, dry skin or stopped sweating

Call emergency services immediately if someone shows signs of heat stroke.


Check on Vulnerable People

Older adults, infants, young children, outdoor workers, and people with health conditions are at higher risk.


Protect Pets

  • Ensure pets always have fresh water and shade

  • Avoid walking dogs on hot pavement

  • Watch for overheating signs like excessive panting or lethargy

 
 
 

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