Trees Turning Brown in August (IMAGE) University of Basel Caption Trees try to protect themselves from extreme drought with various measures such as, for instance, premature leaf shedding. Credit Photo: Dr. Urs Weber, University of Basel, Department of Environmental Sciences 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.