Environment Canada has issued a humidex warning for much of central and southeastern Alberta as heat and humidity combined to make temperatures uncomfortably warm.
Temperatures, forecast to rise into the low 30s Monday, along with elevated humidity levels made temperatures feel as high as 40 degrees in Edmonton.
Environment Canada is advising people to stay in air conditioned buildings or seek shade when possible, drink plenty of water and limit physical outdoor activity.
The hot and humid conditions are expected to continue until mid-week, with humidex values forecast to be near 40 for many locations again Tuesday.
The heat and humidity are expected to break on Thursday with the passage of a cold front.