The London Marathon, Dedicated To The Olympic Games In 2012

In 1974, a decade of work began on the construction of the Thames Barrier across the Thames at Woolwich to deal with this threat. While the barrier is expected to function as designed until roughly 2070, concepts for its future enlargement or redesign are already being discussed.
Climate
London has a temperate marine climate (Köppen climate classification Cfb), like much of the British Isles, so the city rarely sees extremely high or low temperatures. Summers are warm with a July high of 22.8 °C (73.0 °F) and low of 14.0 °C (57.2 °F). But temperatures can exceed 25 °C (77 °F) on many days, and in almost every year they exceed 30 °C (86 °F) on some days. The highest temperature ever recorded was 38 °C (100 °F) on 10 August 2003 during the 2003 European heat wave.