Anglian Water fixed the burst water main in an area of west Norfolk this afternoon, which has affected hundreds of homes.
People living in parts of North Wootton, South Wootton and Castle Rising, near King's Lynn, had been without water or with low pressure since midday on Saturday.
Normal service was returned at about 6.30pm today, after engineers fixed the issue.
Pressure was on to get it fixed as quickly as possible with the heatwave today and on Tuesday, when temperatures could reach up to 4OC.
A red weather warning has also been issued by the Met Office for west Norfolk for extreme heat.
Due to the water issues and the heatwave, North Wootton Academy and South Wootton Junior and Infant School are closed.
A bottled water hub has been set up at South Wootton Village Hall.
Tankers are currently being used to put water back into the pipes.
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