As the deadliest wildfires ever to hit California are blazing through the state, Bill McKibben is out with a new piece in the New Yorker examining how longer droughts, stronger winds, and urban sprawl have worsened these fires. Distinguished Professor of Meteorology at Penn State's Earth Science Center, Michael Mann tells Katy Tur that we can see the impact of climate change in our daily lives already—and it will only get worse.