Manhattan (IMAGE) Penn State Caption Street map of New York City showing maximum projected future storm surge. Natural water is in dark blue, 2100 levels are in medium blue and 2300 levels are in light blue. Credit Catolyn Fish, Penn State Department of Geography Usage Restrictions non commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.