I was just down on Vancouver Island. From what I found there I understand there is some worry about water temps and levels for the spawning runs. Campbell River looked a little low, the Oyster was very low.
There is more fresh water there, but I think in some areas at least, water levels are an issue in that they are lower and warmer than in previous years. They have had heat waves there, though I know some areas have had quick harsh rainfalls. B.C. has had a terrible fire season, they are still in trouble, very little rainfal and certainly no extended rains.
I am not sure about the NWT's I can do a check with their department of environment and see what is going on there.
I do not remember such a dry year. While we were in Kamloops it was 44 to 45 Celsius.