Disappearing Act (image) The Earth Institute at Columbia University Share Print E-Mail Caption Low-level clouds over Los Angeles (seen here in early afternoon) and other urban areas of coastal southern California are becoming rarer, leading to increased fire risk. Credit Park Williams/Lamont-Doherty Earth Observatory Usage Restrictions Credit must be given. Share Print E-Mail 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.