Hi Peter;

Yes, the heat dome was quite an event, and I have been getting alarmed reports from people driving our roadways from the coast to the cascades.  Although I have not driven to Sandy, my observations, and sense from talking to many extension and forestry colleagues, is that although widespreard, it is quite scattered and not as dominant on the landscape as it often appears from the roads.  

That said, we are concerned that there is damage (consistent with drought impacts, which has been hammering the valley and foothills for the last 6 years or so) that we cannot see yet, and will take a while to be expressed.  So we do not know the full impact, nor will we for some time.  And the problem with unprecedented events is that it is hard to know what is ahead, since it is beyond our experience.  

That is the gist of what we know now.  Here is a short blog article that says a bit more  https://blogs.oregonstate.edu/treetopics/2021/07/15/yes-the-june-heat-wave-has-hurt-trees/

And here is a link that would let you contribute information to help researchers better understand this event.   https://blogs.oregonstate.edu/treetopics/2021/07/15/report-foliage-scorch-to-help-study-of-2021-heat-wave/