Japan is sweltering under the hottest day yet of its worst heatwave since records began in 1875. The blistering heat has drawn official warnings of a looming power shortage, and led to calls for people to conserve energy where possible. But the government is still advising people to use air conditioning to avoid heatstroke as cases of hospitalisation rise with the heat. Weather officials warn the heat is likely to continue in the coming days.  Heatwaves have become more frequent, more intense, and last longer because of human-induced climate change. The world has already warmed by about 1.1C since the industrial era began and temperatures will keep rising unless governments around the world make steep cuts to emissions.(BBC)…[+]