Since history first took notice of them 2,500 years ago, the inhabitants of the sun-scorched Cyclades Islands off Greece have led a parched existence. This summer some of the Cyclades are looking positively green. On the island of Hydra a resort hotel that closed two years ago because tourists got tired of going bath-less has now reopened with baths aplenty. Water, which once cost $1.40 a ton in the Cyclades, is now selling for 40¢ a ton.
The Cyclades owe their new verdant look to a fleet of water-carrying Dracones huge, sausage-shaped bags of rubber-covered nylon, which are towed over...