Heat warnings are expected to expand in the west as a prolonged heat event starts to set up across the Prairies.
As of Monday morning, heat warnings had been issued from Environment and Climate Change Canada for portions of southern and northern British Columbia, the Northwest Territories, northern Alberta and areas east of Calgary.
Heat warnings are issued for most of Alberta (excluding the southernmost communities like Medicine Hat, Pincher Creek and Lethbridge) when daytime highs reach a temperature of at least 29 C combined with a daytime low temperature of at least 14 C for at least two consecutive days.
Both daytime high and low temperatures will be above seasonal in Calgary and much of Alberta on Monday. Those temperatures are expected to continue to rise over the next few days.
In Calgary, Monday’s high of 26 C is three degrees above average, but it is also the coolest …