Extreme heat warning issued as humidex set to reach 40 degrees

A stretch of unseasonably hot and humid weather has meteorologists issuing a heat warning, with summer-like humidex values expected to peak at 40 degrees for the first weekend of fall.
Environment Canada issued a heat warning Friday afternoon, with “unseasonably warm temperatures” expected to hit 30 degrees Celsius while the humidity will make it feel more like 40 degrees. The late-arriving heat wave, after a cool and wet summer, is expected to persist into next week.
Most of souther