pockets if we don't take action now. we can solve this problem. >> so a lot of people are going to say, hey, listen, it is late july, heat happens. on top of the wildfires there is, however, another heat wave that's heading for the great plains, midwest and parts of the east next week, bringing temperatures 10 to 15 degrees above average, this follows of course that heat wave in the northwest that killed nearly 200 people in oregon and washington. is climate change making these heat waves more deadly? >> yeah, absolutely. so one of the most confident conclusions we can draw from climate change is that heat waves are going to get worse. so we can be 100% certain that every time you see a heat wave now, climate change has made it worse than it would have been. and the impacts of this are not what we -- what we call linear. it's not like every degree of warming gives you a very small amount of impact.