Heightening Spikes (IMAGE) Columbia Climate School Caption Area burned by California wildfires in thousands of square kilometers, 1972-2018. Specific regions studied are at upper left. Credit Adapted from Williams et al., 2019 Usage Restrictions Credit must be given. 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.