On the night of 31st January 1953, the combination of a high spring tide and a storm over the North Sea caused a devastating surge of water to sweep across the East Coast and up the Thames Estuary. It was one of Britain's worst natural disasters in the 20th century - 307 people lost their lives in England and over 1,800 in the Netherlands - and yet it has largely been forgotten in the UK. It also inspired one of the great works of English social history, The Great Tide by Hilda Grieve, which tells the story of the flood in Essex, and the extraordinary response of its local communities and emergency services. To commemorate the 70th anniversary of the flood, BBC Climate Editor Justin Rowlatt asks what lessons were learned. We’re better protected now as a result of the disaster but, as our coastal defences begin to age and sea levels continue to rise due to climate change, are we prepared for the next tide? Features archive from "Essex Floods" from Essex Sound and Video Archive. Producer: Patrick Bernard A Whistledown production for BBC Radio 4