There is a lot more behind these fires than climate change. 

First off, the Ashcroft/Cache Creek fire started as a grass/brush fire. No trees or forests involved until it got up into the hills around these two communities. 

Second, there is the issue of past fire suppression allowing fuel to build up in the grasslands and forest floor. 

Third, governments and the forest industry have built vast areas of 'monoculture'. Vast tracts of lodgepole pine that are not only susceptible to fires in hot dry years, but also have allowed the mountain pine beetle epedemic to affect vast areas of the interior of BC. This infestation would not have been this severe if the forest had been replanted with the mixed species that was originally there. 

These problems will take many years to work themselves out. There will be many years like this in BCs near future.