So far Yellowstone has escaped this summer’s conflagrations because there has been almost no lightning, but you don’t have spend much time in the Park to see that it is every bit as dry as the summer of 1988.
The first big fire is the Owl Fire in the backcountry at the NW corner of the Park.
Yellowstone Park page on the Owl Fire.
Update late on July 25. The Owl Fire has grown from 200 acres to over a thousand. The new Beaverdam Fire in the remote SE corner of the Park is over 540 acres (about a square mile).
July 26 The latest on the fire on Inciweb. The growth was due to thunderstorm winds.
July 27. The Owl Fire has doubled again, and is now over 2000 acres.