You know the summer routine: The sun comes up, the mercury goes up . . . and the heat and humidity get you down, down, down.
As the temperature climbs you may feel sluggish and headachy, or even fall prey to chronic anxiety. Those are possible signs that you're drinking too little water . . . or, surprisingly, too much.
Either extreme is bad news. Dehydration can lead to any number of nasty health problems, including the one to end all others. Medical opinion is agreed that insufficient water levels can cause everything from heat cramps to myocardial infarction, better known as a heart attack. Too much water, however, can also strain the heart and other organs.