I've been using fire hose for years and have never had any problems, though admittedly I never rode
out a full fledged hurricane
I've seen lots of theoretical comments about fire hose keeping water out and allowing the rode
to heat up, but I've never seen any first hand testimony to that effect. As Guy said in his post, when it's bouncy enough to need chafe gear
it's usually pretty wet up where the anchor
rode is. Unlike a real fire hose, a piece of same for chafe gear
isn't sealed at both ends.
If it worries you that much, it's pretty simple to remove the rubber lining from the hose, leaving the outer casing, which is pretty darn tough all by itself.
I usually attach the fire hose by piercing it at both ends and using a couple of pieces of small stuff to tie it to the rode.
One thing about using items like clear hose for chafe gear -- make sure it won't fracture in very cold temperatures if you're in someplace north.