Glasgow’s relationship with water has never only been profitable. The city sits low on a tidal river, laced with tributaries — the Kelvin, the White Cart, the Molendinar and a dozen lesser burns, many of them long since buried in culverts beneath the streets — and it has flooded, in one quarter or another, throughout its recorded history. Great Clyde floods in the eighteenth and nineteenth centuries put the low-lying riverside — the Green, the Saltmarket, the Gorbals shore — under water repeatedly before embankments and the deepened channel tamed the worst of it.
In the modern city the danger moved from the river itself to the rain. The most serious recent episode came on 30 July 2002, when a slow summer storm dropped weeks’ worth of rain on the East End in hours. The Victorian sewers could not begin to cope; streets and hundreds of homes in Shettleston, Greenfield and beyond flooded with sewer water, and thousands of people were affected in what remains the benchmark Glasgow flood of recent times.
The south side’s flashy White Cart Water, which had flooded Cathcart and Pollokshaws for generations, was answered in 2011 by one of Britain’s larger flood schemes: storage areas upstream that hold back the peak of the flow, releasing it slowly, paired with defences through the city. It has been credited with sparing thousands of homes in the storms since.
The 2002 disaster also produced a longer, quieter revolution in how the city drains. A metropolitan drainage partnership set about rebuilding capacity across the map, and its showpiece opened in 2019: the ‘Smart Canal’, in which the Forth & Clyde Canal is lowered automatically ahead of forecast storms to swallow the runoff of the regenerating north of the city — a Victorian waterway given a twenty-first-century job.
The work is not done, and a warming climate is loading the dice towards heavier bursts of rain. Glasgow’s floods rarely kill, and so they sit lightly in the city’s memory beside its fires and crushes — but they are the disaster that is still arriving, and the one the city is spending most to prevent.