This isn't ideal.
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The growing wildfires in the Pacific northwest are starting to have a larger effect on those communities as a whole, and now the wildfires are starting to impact the University of Oregon. According to Oregon Live, the Ducks have been forced to move football practices to a middle school an hour away due to the declining air quality around Autzen Stadium.
The stadium currently looks like this:
https://twitter.com/tysonalger/status/905108784896401408
Not great, but a good move by Coach Willie Taggart and co. to be watching out for the health of his players.
Despite moving the practices, Oregon is still expecting to be good to go for Saturday's home game against Nebraska. Oregon Live mentions that the current forecast for Saturday is clear skies.