Homes in south London had to be evacuated last night as a river of brown, murky water swept through the area. Initial reports suggested a sewage pipe had sprung a leak.

Twitter was awash with photos of the 'river of poo' on Clapham Road near Oval station in Kennington. Toilet humour abounded using the Twitter hashtags #londonpoo and #poonami.

A Thames Water spokesman later pooh-poohed the sewage theory, saying the incident was caused by a burst water main, mixed with silt and mud.

Another view of the deepening problem in South London as sewage flows down the streets: pic.twitter.com/K3t6xvWaqG

— Lewis Whyld (@LewisWhyld) February 27, 2014

Yep, that's someones front door and the #londonpoo is halfway up it... pic.twitter.com/z82o0ATQaG

— Lewis Whyld (@LewisWhyld) February 27, 2014

Residents evacuating by any means from #londonpoo here using plastic bags as wellies... pic.twitter.com/unkLD4Otqm

— Lewis Whyld (@LewisWhyld) February 27, 2014

So happy I didn't actually see him put her down, they just kept going... #londonpoo pic.twitter.com/REWaXjaaqu

— Lewis Whyld (@LewisWhyld) February 27, 2014

Enoch Bowel's "Rivers of poo" prophecy coming true I see #londonpoo

— Al Murray (@almurray) February 27, 2014

Is anyone doing anything about #londonpoo - or are people just going through the motions? #soverysorry

— Jamesy 🇪🇺 (@jamesy1962) February 28, 2014

Prince Charles rushes to Kennington to see the #poonami first hand as sewage flows through south London pic.twitter.com/cTGwhWWwoo

— Elliot Wagland (@elliotwagland) February 28, 2014

Apoocalypse Now #Poonami pic.twitter.com/vFlKVfxXG0

— General Boles (@GeneralBoles) February 27, 2014

Ed Miliband is first on the scene #LondonPoo #Poonami pic.twitter.com/RxbjkIi5cv

— General Boles (@GeneralBoles) February 27, 2014