|The heat and humidity will build as we head into this weekend with highs reaching 30C in Montreal. (AccuWeather)|
The heat is already building across western Canada. On Wednesday, Lytton, BC had a record high of 40.2C (104F) surpassing the old high of 39.7C. Estevan, Saskatchewan was 36.7C (98F), and Regina 32.9C (91F). The heat will remain into Saturday for the west with highs reaching well into the upper 30's with perhaps an isolated 40C. A strong cold front will bring an end to the heatwave out west by Sunday as it races across the Prairies and into Ontario and Quebec by next Tuesday. Strong to severe thunderstorms are likely with this front as it marches east across southern Canada.