57 tube stations at high risk of flooding, says London Underground report

Busy stations including Waterloo, King’s Cross and London Bridge among the
most threatened, unpublished review states
....

The unpublished flood risk review, produced by LU and obtained by the
Guardian, says: “London has been fortunate to escape the worst of recent
storm events in the UK, but it is only a matter of time before heavy
rainfall seriously affects London and the underground network. The risk is
generally expected to increase [as] climate change predictions are that
storms will become more intense. There is some evidence to show that these
have already increased in frequency.�

http://www.theguardian.com/uk-news/2016/apr/10/57-tube-stations-high-risk-flooding-london-underground-report

In future Tube stations should be built on the tops of mighty hills.