A Heat Warning remains in effect for Perth County.
Environment Canada says the heat and humidity is expected to continue through Wednesday and possibly extending into Thursday.
Daytime maximum temperatures: 30 to 32 degrees Celsius, with humidex values 37 to 42.
Nighttime minimum temperatures: 17 to 21 degrees Celsius.
The weather agency says the hot and humid air can also bring deteriorating air quality and can cause the Air Quality Health Index to approach the high risk category.
