Mapping Urban Heat Island Effect (IMAGE) Portland State University Caption Researchers at Portland State University mounted a temperature sensor and GPS to cars to collect approximately 50,000 temperature readings during one day of an extreme heat event. Credit Courtesy of Institute for Sustainable Solutions 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.