Based on their strategic location, delta countries owe their prosperity to a great extent to their relationship with water. Water functions as the source of their food supply, energy and fertile soil. However, water has always posed a significant threat as well. Nowadays climate change further increases this vulnerability. City boards, industries, knowledge institutions and citizens are becoming more aware of climate change' potential effect on their safety. To respond to these challenges, sustainable solutions are often multi-disciplinary, and often very simple. That doesn't mean benefits are small.