I follow the weather obsessively, but I can’t remember any other time in modern American history when a town of more than 25,000 people was demolished in just six hours, like Paradise, California, was. Maybe Homestead, Florida, during Hurricane Andrew in 1992 — but Homestead at least had a few days warning. Maybe Moore, Oklahoma, which suffered four devastating tornadoes between 1999 and[Read More…]

The last time atmospheric carbon dioxide levels were this high, millions of years ago, the planet was very different. For one, humans didn’t exist. On Wednesday, scientists at the University of California in San Diego confirmed that April’s monthly average atmospheric carbon dioxide concentration breached 410 parts per million for the first time in our history. We know a lot about how to[Read More…]

Last week, at a New Orleans conference center that once doubled as a storm shelter for thousands during Hurricane Katrina, a group of polar scientists made a startling declaration: The Arctic as we once knew it is no more. The region is now definitively trending toward an ice-free state, the scientists said, with wide-ranging ramifications for ecosystems, national security, and[Read More…]