As I predicted in this blog post, Mr. Fenn would eliminate water from the treasure hiding spot possibilities. Good for him. Ultimately searchers are responsible for their own safety but this is a step in the right direction as minimal cost to his treasure hunt.
Mr. Fenn issued his latest safety warning today and verified that:
The treasure chest is NOT under water,
It is NOT near the Rio Grande River.
It is NOT necessary to move large rocks or climb up or down a steep precipice, and
It is NOT under a man-made object.
That is four more "nots" for treasure hunters to heed.