No, this tree is not on fire! Even though it looks like it is about to explode, this is part of the laser light show projection. Watching this you will see the “fire” engulf the tree and then other patterns will appear and suddenly vanish. In the end, it is just the tree standing there as it has done for many years.
The previous photo has a video showing the transitions.
To enlarge this photo or to see more options, click on the photo and wait about 15 seconds.