Houston Flooding (IMAGE) Rice University Caption Harvey caused some of the most catastrophic flooding in US history last month. A new study of flooding between 1999-2009 in several southeast Houston suburbs found that FEMA's 100-year flood plain maps failed to capture 75 percent of flood damages from five storms, none of which reached the threshold of a 100-year event. Credit Jeff Fitlow/Rice University Usage Restrictions For news reporting purposes 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.