Thousands of people in Cambridgeshire have been left without water after a pipe burst early on Monday.
Cambridge Water said the pipe had burst off Hattons Road in Longstanton.
About 3,000 people living in Longstanton and the surrounding villages were without water while engineers worked to restore the supply.
A Cambridge Water spokeswoman said the water supply would be rerouted and customers should have mains water within several hours.
Managing director Stephen Kay said: "Owing to the severity of the burst main in Hattons Road, Longstanton, it will take a few hours to fully recharge the system."
Bottled water is being delivered to customers who are listed as having individual needs.
When the supply is restored the water may be a brown or milky colour and customers should run the cold water until it runs clear, the spokeswoman said.
The company apologised for any inconvenience caused.