Around 3,600 homes in East Sussex have been left without water after a burst water main last night.
Some schools in Plumpton and Ditchling have been forced to close, although some supplies are now being restored.
South East Water have been handing out hundreds of bottles of water in villages around Lewes while they carry out repairs.
The incident happened just before midnight.
Yay! Supplies should now be restored in Plumpton Apologies for the inconvenience caused this morning & thank you all for your patience!
Great news! Supplies should be returning to #Ditchling now Very sorry for this mornings disruption & thank you all for your patience.
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The 22 year old man is seriously injured in hospital. Police believe a baseball bat and iron bar may have been used in the attack