Could climate change be causing our wet summer? asks Met Office The melting of the sea ice may be affecting the position of the jet stream, a band of low pressure that has been stuck over the UK much of the summer bringing wind and rain. Dr Stott said recent ground-breaking work by the Met Office has once again proved that climate change is already having an impact on weather patterns across the world. The peer-reviewed report showed that the second hottest November on record in the UK in 2011 was 60 times more likely than in the 1960s because of climate change. However the second coldest winter on record in 2010 was half as likely because of warming, making it an even more unusual event. The international research, in partnership with American Meteorological Society, showed that a drought in Texas in 2011 was 20 times more likely because of climate change that it would have been in the 1960s. However the floods in Thailand in the same year were more likely to be caused by other factors such as building blocking rivers. Dr Stott said the new research is further evidence climate change is already increasing the risk of extreme weather. But human factors and freak weather patterns mean it is impossible to ever say with certainty that a single event was caused by climate change. "Our vulnerability to extreme weather is much greater than is used to be," he said.