Radar Images of Houston Before and After Harvey (image) NASA/Goddard Space Flight Center Share Print E-Mail Caption Radar images of Houston, Texas before and after Hurricane Harvey made landfall were taken by The German Aerospace Center's TerraSAR-X satellite. Flooded areas appear in light blue. Waterways appear in darker blue. Credit Credits: German Aerospace Center (DLR) Usage Restrictions None Share Print E-Mail 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.