2011 Texas Drought Length and Severity (IMAGE) University of Texas at Austin Caption This graphic reflects drought area and severity in Texas from 2010 to 2013. The bottom graph shows the findings of the U.S. Drought Monitor, the current standard for designating drought across the United States. The top graphic reflects the findings of an updated model that incorporated additional soil moisture-related data from satellites. The updated model simulation showed that more areas in Texas were experiencing severe drought longer than previously thought. D0-D4 are drought levels that grow in severity as the number increases. Credit University of Texas Jackson School of Geosciences Usage Restrictions credit License Original 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.