July heatwaves ‘virtually impossible’ without climate change A heat advisory sign is shown along US Highway 190 during a heat wave in Death Valley National Park in Death Valley, California, on July 16th, 2023.  | Photo by Ronda Churchill / AFP via Getty ImagesIt’s been a viciously hot July for much of the planet thanks to heatwaves made worse by climate change. A new study breaks down how much of a role t…