Riddle

Showing results for Jon is stuck on a island covered in endless trees.One day when the wind was blowing from the west lightning strikes the west end of the island and sets fire to the forest .The fire is very violent burning everything in its path and without stopping it the fire will burn the entire island killing the man in the process.There are cliffs around the island so he cannot jump off and there are no bodies of water close enough for Jon to seek refuge.How can Jon survive(there are no tools or buckets to hold water)