How the U.S. needs to plan for increasingly common heatwaves

Extreme heat and drought are baking the Western U.S. and Canada again this week, following hundreds of heat-related deaths in the Pacific Northwest last week. Record-breaking temperatures are expected to return to California over the weekend, including in the San Joaquin Valley. William Brangham, currently reporting from the city of Visalia, joins Judy Woodruff with the latest on the heat.