Guardian: Britain’s rivers could nearly run dry because long hot summers caused by climate change will not be sufficiently compensated by wetter winters, researchers predict. It is a scenario that would endanger wildlife and send household water bills soaring. Flows in the Mersey and Severn are likely to be reduced in summer by up to 80 per cent by 2050, according to a study by the Environment Agency. The Thames’s flow is likely to decline by up to 50 per cent during the same period. It …