Urban heat stress image (IMAGE) DOE/Pacific Northwest National Laboratory Caption In proposing a better way to measure heat exposure in U.S. cities, researchers find that the average Black urban resident is exposed to disproportionately higher heat stress. (Image by Timothy Holland | Pacific Northwest National Laboratory) Credit Image by Timothy Holland | Pacific Northwest National Laboratory Usage Restrictions Image created by PNNL. No Restrictions. 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.