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Drowning

Con check DC 10; 1 round interval; -1 penalty/interval; 1st round unconscious (0hp); 2nd round dying (-1 hp); 3rd round death.

Any character can hold her breath for a number of rounds equal to twice her Constitution score. After this period of time, the character must make a DC 10 Constitution check every round in order to continue holding her breath. Each round, the DC increases by 1. See also: Swim skill description.

It is possible to drown in substances other than water, such as sand, quicksand, fine dust, and silos full of grain.

Starvation

Con check DC 10; 1 day interval; -1 penalty/interval; 1d6 nonlethal damage; Special: Characters can go three days without food before they suffer the effects of this hazard. A character who takes damage from this hazard is automatically considered fatigued. Damage inflicted by starvation cannot be healed until the character receives adequate amounts of food. If a character is rendered unconscious and would take further nonlethal damage, he instead takes lethal damage.

Thirst

Con check DC 10; 1 hour interval; -1 penalty/interval; 1d6 nonlethal damage; Special: Characters can go one day plus a number of hours equal to their Constitution without water before they suffer the effects of this hazard. A character who takes damage from this hazard is automatically considered fatigued. Damage inflicted by thirst cannot be healed until the character receives adequate amounts of drink. If a character is rendered unconscious and would take further nonlethal damage, he instead takes lethal damage.