When I woke up at 4am this morning, the power was out. It came back about 4:20am. I went to work (down N4) at 4:30am. The line of fire can be seen on the north slopes (north of N4), about 1/2 east of Jackson Lake. It appears to be just north of whatever that 1st group camp is (on the north side of the road), you'd pass if you were traveling toward Jackson Lake from Big Pines..
When I went thru, fire was just responding. Although N4 was open when I went thru, it would expect they will close it soon, if nothing else, because of smoke.