Heat Wave Trend (IMAGE) Virginia Institute of Marine Science Caption Cumulative heat wave intensity by year in the Chesapeake Bay between 1986-2020, as averaged among the selected temperature-monitoring stations. The dotted line shows the increasing trend. Credit Virginia Institute of Marine Science. Usage Restrictions One-time use only. 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.