Climate Change Makes Storms like Harvey More Severe

In Texas, tens of thousands of residents began evacuating coastal communities Thursday, as forecasters predicted Hurricane Harvey could make landfall late Friday as a major category-three storm, delivering a life-threatening 35 inches of rain to some parts of the Gulf Coast. Texas Governor Greg Abbott called out 700 members of the National Guard as several coastal counties ordered mandatory evacuations. Hurricane trackers expect the storm’s eye to come ashore near the city of Corpus Christi, where mayor Joe McComb called for a voluntary evacuation. For more we speak with Dan Kammen who just resigned as science envoy for the U.S. State Department.