Britain's cities are getting hotter and trapping heat they can no longer release

OS analysis reveals where urban heat islands could intensify most this century.

After a summer of record temperatures and heatwaves, new analysis from Ordnance Survey has found more than eight in ten cities in Great Britain are already highly vulnerable to urban heat islands, and almost two thirds are set to reach severe heat vulnerability by the turn of the century. Not only is the urban heat island effect set to intensify in London, but cities like Portsmouth will be particularly vulnerable, and among those projected to warm most between present day and 2070 to 2100 are Leicester, Exeter, Nottingham, Brighton and Bristol......