The Unabomber reached out. Thanks, Ted, you're not nuts at all. Every generation has their own boogeyman. After September 11th, 2001 Osama Bin Laden was the most wanted and most feared man in the world, up until the raid on his compound that left him dead.
In addition to not drinking enough water, water can be lost through sweat, vomiting, diarrhea and using the restroom. Many problems may occur when you don't drink enough water, including heatstroke, seizures and possibly death. The first complication of not drinking enough water is dehydration. Symptoms of dehydration may include thirst, sticky or dry mouth, tongue, lips and skin as well as a mild headache.
Dehydration from insufficient water intake and/or water loss affects a much, much higher percentage of people than water intoxication. The danger of drinking too much water is not so much about how much water you drink, but how fast you drink it, as noted in the case with the California woman. It is better to have small amounts of water frequently rather than trying to force large amounts of fluid at one time.