1% dehydration – thirsty.

2% dehydration – a feeling of anxiety, reduced appetite and efficiency by 20%.

4% dehydration – a feeling of nausea, dizziness, emotional instability, fatigue.

6% dehydration – loss of coordination, coherence of speech.

10% dehydration – breached thermoregulation in addition to all said below symptoms. Cells are beginning to die.

11% dehydration – now it’s not enough to drink water. The chemical balance of the organism has undergone serious changes. In order to restore it you need professional medical care.

20% dehydration – may lead to death.