I don't think there are, specifically.

You could import the rules from one of the AD&D Survival Guides. I would probably do something like this: Every day without water or week without food requires a CON test to avoid a cumulative -1 to hit, damage, and saving throws (and also morale and loyalty for NPCs). After three days without water, an extraordinary feat of CON must be made every day; if this fails, the character must make a death save or keel over dead. After three weeks without food, an extraordinary feat of CON must be made every week; if this fails, the character must make a death save or keel over dead.

If one applies the real world rules of 3, then the following cases can be used by the GM..

3 minutes without air=death
3 hours without shelter (exposed to extreme weather)=death
3 days without water=death
3 weeks without food=death

Using those real-world examples, The GM should be able to interpret some negative impacts as a character moves closer to the death option of each condition. 

Example: 3 days without water will kill a human (real world), but before that, there will be notable consequences,
Day one, a little dizziness, some lack of dexterity, disorientation,
Day two, significant dizziness, disorientation, concentration. Stamina, strength and Dexterity issues.
Day three, No concentration (no spell use), Significant; Stamina, Dexterity, strength, intelligence, wisdom across the board.
Day four, Death save days, if passed, then keep layering on the reductions in Int, Str, Wis, Dex, Stam...
Day Five or more, Death Save with lowered stats, and is still passed, again lower all stats and start heading the character to a coma state.

this of course only a suggestion, a GM can make their own rules.