The recent floods in Valencia (climate crisis-exacerbated version of the usual localised autumnal downpours) are prompting major rethinks about where we should be living and building.

Previous events have led to the rerouting of entire rivers, and even villages. But that was back in decades when governments enjoyed much more societal permission to just say, 'right - this is what we're doing, no questions asked'.

Plans were drawn up 20 years ago to avoid a particular bottleneck which fatally flooded last month, but ended up being left in the administrative filing cabinet.