By the time a person becomes severely dehydrated, there is no longer enough fluid in the body to carry enough blood to vital organs. Shock, which is a life-threatening condition, can develop quickly.

A severely dehydrated person may not be able to cooperate or communicate.

Symptoms of severe dehydration (even if only one of them is present) include:

• Altered behavior, such as severe anxiety, confusion, or not being able to stay awake.
• Faintness that is not relieved by lying down, or lightheadedness that continues after standing for 2 minutes.
• Inability to stand or walk.
• Rapid breathing.
• Weak, rapid pulse.
• Cold, clammy skin or hot, dry skin.
• Little or no urine for 12 hours or longer.
• Loss of consciousness.

Severe dehydration is a medical emergency and requires emergency treatment. Call 911 or other emergency services immediately.