Sometimes things literally go off the charts. Especially with the climate in recent years. In this episode Michael Wehner, recently retired Senior Scientist at Lawrence Berkeley National Laboratory, talks about why he and his team decided it was time to change the Saffir-Simpson hurricane rating scale. Instead of category 5 hurricanes should now go to category 6, they argue! Michael also discusses climate modeling, uncertainty, risk, prediction, and the perils of inequality, poverty and life on warming planet.