Can the body break down fat stores for WATER during a DF?

Most of us are familiar with the idea that the body uses its intelligence, once ketosis has started, to break down fat reserves for fuel during a water fast. What I am wondering is whether it can use its intelligence during a DF to break fat down for the water it is binding up?

I know that fat takes up a lot more water than muscle does, which is why when you lose fat, according to a fat/water scale, your water level goes up and when you gain fat, your water level goes down. So if you put your body _in extremis_, no water, does it know to go to its fat for water, as a camel may go to his hump to access it for water?

I guess if this were true, someone who has plenty of fat reserves could not die _of dehydration_, and I am not sure that this doesn't happen plenty of times, so I don't know. It would mean, effectively, that one could not die of dehydration until one had very little fat left on one's body. I guess that does not seem very likely. I just wished there to be the same reliable, trusty elegance about DF that we understand there to be about (the body's wisdon during a ) WF.