Daytime highs to reach lower thirties tomorrow and Friday.
Niagara is once again under a heat warning.
Environment Canada says hot and humid conditions are in the forecast for tomorrow and Saturday.
Daytime highs will reach the low thirties, with humidex values in the upper thirties.
The weather office says the alert could stretch into Sunday as well.
Overnight lows will be about 20 degrees Celsius over the next couple of days, providing little relief from the heat.
The weather office advises you to watch out for the signs of heat illness, including swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions.
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