Flood Risk Classifications (IMAGE) Arizona State University Caption Flood risk classifications provided by National Flood Hazard Layer for Houston-Galveston area displayed over greyscale Landsat7 Global Imagery Mosaic. Credit Megan Miller 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.