A heatwave has been sweeping across Europe recently, causing record temperatures across the continent and creating a lot of consternation in the Naked Scientist office. But where do heatwaves come from. And what's going to happen in the future. Adam Murphy spoke to Manoj Joshi, professor of climate dynamics from the University of East Anglia, starting with what a heatwave even is. Like this podcast? Please help us by supporting the Naked Scientists