Environment Canada has issued a heat warning for the GTA, including Toronto, with forecasters calling for two straight days of sun and soaring temperatures — and Thursday shaping up to be particularly scorching.
“The hottest conditions are expected on Thursday. While daytime high temperatures will not be as extreme on Friday and into the weekend, nighttime lows are expected to remain warm throughout,” the warning states.
The national weather agency says daytime temperatures on Thursday are expected to soar to 35 °C with humidex values up to 44.
On Friday, the forecast calls for a daytime high near 30 °C, making it feel more like 40 with the humidity.
The overnight temperatures on both days won’t provide much relief from the heat, with lows between 20-23 °C.
Environment Canada said the extreme heat could continue through the weekend for some areas.
Wednesday was expected to reach a high of 28 °C, but the humidex will feel more like 31. The skies would remain mainly sunny, offering ideal conditions for outdoor plans. However, residents are reminded to stay hydrated and take breaks in the shade when possible. Nighttime temperatures will be pleasant and comfortable, dropping to 19 C.
The weather agency is warning of a high UV index over the next couple of days, meaning sunburn can occur quickly without protection.
People are advised to limit time outdoors during peak afternoon hours, wear sunscreen, and check in on vulnerable individuals, including seniors and young children.
The extreme heat may also pose risks for those without air conditioning, and Toronto Public Health recommends using cooling centres or community spaces as needed.
“Watch for the early signs of heat exhaustion in yourself and others. Signs may include headache, nausea, dizziness, thirst, dark urine and intense fatigue. Stop your activity and drink water,” Environment Canada warns.
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