Regardless of your world view, there is validity to the article and the current low water levels aren't just due to a dry spring or late melt.
I did a quick search of historical Fraser River levels at Hope. For the past 10 years for the months of Jan, Feb March, the water levels rarely dipped below 3m; it was averaging well in excess of 3.0 for that time frame.
For the same time period in 2023, the water had just one blip above 3.0m in January. For the rest of the 3 month time frame, it was averaging around 2.6-2.7m.
So yes, the Fraser is lower than historical levels.
(I'm not a data scientist, I just play one on TV)