Warming Up (IMAGE) Columbia Climate School Caption Annual municipality-level increases in the rate of urban population exposure to extreme heat, 1983-2016. Credit Adapted from Tuholske et al., PNAS, 2021 Usage Restrictions Credit must be given. 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.