> Such conditions could be expected to occur naturally only rarely – about once a century. > They are now at least two and a half times more likely to occur, w

> Such conditions could be expected to occur naturally only rarely – about once a century. > They are now at least two and a half times more likely to occur, with a frequency probability of about once in 40 years > If global temperatures rise by more than 2C (a rise of 3.6F) above pre-industrial levels, such heatwaves will become one-in-20-year events in the region