On a daily basis, most people get enough fluid through normal drinking behavior, such as drinking with meals and snacks. However, children, older adults, people working in hot climates and those who exercise vigorously should pay close attention to their hydration needs.

If you don't get all the fluids you need, you may start to feel dizzy, get a headache or develop muscle cramps. Even mild dehydration can affect physical and mental performance, while severe dehydration can be life-threatening.
Because dehydration can develop quickly under some conditions, it's important to recognize the following signs of dehydration in others and act quickly to help them cool down and re-hydrate:
To avoid dehydration and perform your best, pay attention to your thirst and make sure you consume plenty of fluids throughout the day. Here are some tips for staying hydrated.