One of the top posts in this thread!....Canada has been en fuego for months.
The source region(Canada) for cold/cool air in the US has warmed so it only stands to reason that the US has also become warmer. And the warming across Canada and the US has led to a change in weather patterns.
https://www.canada.ca/en/environment-climate-change/services/environmental-indicators/temperature-change.html
https://www.ctvnews.ca/climate-and-environment/canada-faces-green-christmas-as-el-nino-follows-warm-summer-head-climatologist-says-1.6696529
...towards the end of the article Phillips makes a great point about El Ninos being different now because of worldwide warming..