Blistering heat that has baked swathes of North America and Europe this month would have been "virtually impossible" without human-caused climate change, researchers said Tuesday, as intense temperatures spark health alerts and stoke ferocious wildfires. With tens of million people affected in the northern hemisphere and July on track to be the hottest month globally since records began, experts warn that worse is to come unless we reduce planet-heating emissions. Severe heatwaves have gripped southern Europe, parts of the United States, Mexico and China this month...