USA Today: Could the USA deal with a Hurricane Katrina every two years? Such a scenario is possible by the end of the century due to climate change, according to a study published Monday in the Proceedings of the National Academy of Sciences. The frequency of extreme storm surges the deadly and devastating walls of water that roar ashore during hurricanes is projected to increase by as much as 10 times in coming decades because of warming temperatures, the study finds. Global warming has already doubled...