Humidex expected to climb to 40 C
Environment Canada says daytime temperatures will climb to the low to mid 30's today and tomorrow with humidex values near 40.
Overnight low temperatures will only fall to the low to mid 20's, meaning no relief from the heat.
A cold front will move in tomorrow night with showers and thunderstorms bringing and end to the heat and humidity.
The weather office adding 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.

Police Again Looking for Missing Teenager
St. Catharines Joins Effort Against Human Trafficking
Municipalities Left Disrespected: Burch
More Opposition to Gov't Change Approach
One Arrest after Weekend RIDE Checks
Mayor Sides with Chair on Region
More Time Needed on Gov't Change: Mayor
Regional Councillor Wants in Discussion