Flood Height Figure (IMAGE) Rutgers University Caption Flood heights increased 1.2 meters from the prehistoric era to the modern era, mainly due to rising sea level, researchers found. Credit PNAS Usage Restrictions None 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.