"Due to the fire situation, road and highway closures could change very quickly. Hwy 20 is now closed between MP206 to MP215. Hwy 153 is closed at MP6-21 and at a Level 3 Notice between the town of Carlton and Pateros. Hwy 97 is closed between Pateros and Brewster."
It looks like it's still possible to get out of the Okanogan valley on 17 or by going north into Canada, though the Inciweb report shows the fire's jumped the river below Omak. It would be prudent to avoid this route from Republic west to Washington Pass, or perhaps to Concrete.
(I wish I could send them the showers we've had today!)