Map of Warming Lakes (IMAGE) Washington State University Caption Lakes are warming at a global average of 0.61 degrees F per decade (0.34 degrees C per decade). Credit Illinois State University/USGS/California University of Pennsylvania 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.