The 'informal settlement' (read: slum) of Safat el Laban is home to around 400,000 residents. Normally, they get around 2 hours of water a day. Recently, during the oppressive Egyptian summer, this has been reduced to zero.
This is a report of the sit-in held at the Giza governate HQ in protest at the water cuts.
And this is footage from within Safat el Laban, where families are seriously affected by the lack of water: