JACKSONVILLE, Fla. -

Water makes up 60-percent of your body and without enough of it, dehydration sets in  causing dry mouth, tiredness,and headaches.  According to the old rule of thumb, you need at least eight glasses of water a day to stay hydrated. However, the good news is you don't have to drink all that water.  You can eat some of it too.

Try cucumber: it's nearly 97 percent water, with the highest water content of any solid food. Slice it up in salads or put it in soups and sandwiches.

Celery is another good option. It not only hydrates, it also neutralizes stomach acid, relieving heartburn and acid reflux. Water content: 95.4 percent.

Try putting radishes in your summer coleslaw and salads. They're 95.3 percent water and provide a burst of spicy, sweet flavor.

Tomatoes contain 94.5 percent water. Try different varieties too, like sweet cherry or grape tomatoes. Skewer them on a toothpick with basil leaves and chunks of mozzarella for a quick appetizer.

Watermelon and cauliflower are also good for hydration. Made up of 91.5 and 92 percent water, studies show they also help fight cancer.