The Heat Wave That Hit the Pacific Northwest

The heat wave that hit the usually cool and rainy American Pacific Northwest was a shock to many — Oregon and Washington were covered by a blanket of heat in the triple digits. After the temperatures soared, a group of scientists quickly came together to answer a crucial question: How much is climate change to blame? Guest: Henry Fountain, a climate change reporter for The New York Times; and Sergio Olmos, a freelancer for The Times.