The content originally appeared on: CNN London (CNN Business)Europe is bracing for the potential of a full-blown gas crisis later this week just as an historic heatwave has hiked demand for energy to help cool the continent's homes and businesses. On Thursday, the Nord Stream 1 pipeline - a crucial artery linking Russia's gas to the bloc - is due to reopen after 10 days of routinemaintenance work. But concern is building that Russia will keep the taps turned off […]