Cities in Great Britain most vulnerable to extreme heat revealed

OS index examines which ‘urban heat islands’ suffer the most – and which cope the best with rising temperaturesPortsmouth, Leicester, Exeter, Bristol and Nottingham will be among the cities that warm the most by the end of this century as global heating turns British cities into urban heat islands, according to research.Analysis from Ordnance Survey (OS) has created a heat vulnerability index for all cities in Great Britain. Portsmouth, which sits on the south coast of England