The Tunnel Fire north of Flagstaff has closed a stretch of 89 in both directions, and closed Wupatki and Sunset Crater National Monuments as well. If planning to enter South Rim via 89 heading north from Flagstaff to Cameron and then west on 64 to the east park entrance, you'll need to use an alternate route. Same if heading north on 89 to Page, or heading south from Page/Lees Ferry on 89 to Flagstaff and onwards to Sedona (see my note below). This fire is reported to be fast moving and zero % contained.
The routes from Flagstaff or Williams to the South Entrance via 180 and/or 64 are open.