Overexerting Oneself Whilst Fasting

1. Due to cooking, one became so thirsty and uneasy that without drinking water one feels that one can die, the fast in this case should be broken.
2. If a person did this intentionally, that is the person overworked himself to the extent that severe thirst overcame him and without drinking water he may lose his life, then although breaking the fast is proper but the person will be sinful for overexerting himself.

(Behshti Zewar)