BC, or any part of Canada hardly gets hot for half of the year.
https://www.accuweather.com/en/ca/vancouver/v6c/april-weather/53286 So far, only April 20 was the only day to get above 21C. It actually just barely got above 70F, reaching 22C.
https://www.accuweather.com/en/us/anchorage/99501/april-weather/346835
Its been difficult for Vancouver to get above 20C so far this year.
https://www.accuweather.com/en/ca/whitehorse/y1a/april-weather/51876
Perhaps if April weather in Vancouver is compared to Anchorage and Whitehorse, then it might seem like a heatwave to those places.
https://www.accuweather.com/en/us/seattle/98104/april-weather/351409 Seattle has only had 3 days in April above 21C, so far. That's just 3 days in the low 70s.