Tens of thousands of households across the South East have been told to use as little water as possible, after rising temperatures caused burst pipes.
Many homes have lost their mains supply, and are having to use bottled water instead.
South East Water says around thirteen thousand homes are affected, and engineers are working round the clock to fix the leaks.
Schools have been forced to close, while farmers are struggling to make sure their livestock have enough to drink.
Malcolm Shaw has been finding out how one community in Sussex has been coping.
A family in Sussex face a Christmas without proper heating, water or sanitation.
The Maltbys from Northiam have always used a well to supply their home, but now it's run dry.
And it could be three months before their house is connected to the mains water supply, as Malcolm Shaw now reports.
Southern Water has been named as the worst performing water company for the FOURTH year in a row - after so many of its customers complained. A report by the consumer watchdog found innacurate bills and problems with meters.
A water main burst at Bishopstoke, between Eastleigh and Brambridge. Southern Water crews have been carrying out repairs.
Gray Surman sent in video of the burst water main at Bishopstoke in Hampshire.
Water has been restored after more than a thousand homes were left without supplies on the Isle of Sheppey after a mains burst. Hundreds of households were relying on bottled water and 3 schools had to close on Friday.
Southern Water says some people may still experience problems as the supply becomes re-established. It comes after long-running repairs were carried out to the Island's water main under the A249 at Bobbing.
Sarah Saunders reports
Hundreds of homes on the Isle of Sheppey in Kent have been without water for a large part of the day after a mains burst. This happened on the A249
Southern Water say "We are working as swiftly as possible to reconnect the water supply to customers on the Isle of Sheppey. Bottled water is available at Morrison's supermarket in Queenborough. We are sorry for the inconvenience but it is unlikely that water supplies will be connected this evening.
This is because once the water supply is reconnected it will take a few hours to test and refill the water network in the area."
Of all the threats to our rivers and water supplies, pollution has to be the most dangerous, with the potential to wipe out whole eco-systems.
Swalecliff Brook near Whitstable, Newmill Chanel near Tenterden and Shinewater Lake near Eastbourne are just three of our waterways to be hit by pollution in the last five years.
But who is responsible? And is anyone now prepared to take care of the precious resources that have sustained us, and wildlife, for centuries? Andy Dickenson reports.