Anglian Water has introduced a hosepipe ban across the East of England, including West Norfolk.
The ban, its first in a decade, is needed because the prolonged hot weather is putting water supplies under pressure.
Restrictions officially begin at 01:00 BST on Saturday, but residents are being asked to limit their water use immediately.
A spokesperson said: “A Temporary Use Ban, also known as a hosepipe ban, has been introduced across our region.
“Until these restrictions end, you can’t use a hosepipe for watering gardens, washing cars, patios and boats, or filling swimming and paddling pools.
“This year has been exceptionally hot and dry and we’re already experiencing the third heatwave of the summer. Our teams are working 24/7 to keep taps flowing across the region, but the prolonged hot weather is putting water supplies under pressure.
“Every extra day of hot weather makes it harder to balance water supply and demand, making it more important than ever that everyone uses water wisely.
“River levels across the region are already low, so to help protect these essential water sources and make sure water is available for everyone, it’s important we all take action now.”
Find out more about what the temporary restrictions mean and who is exempt at anglianwater.co.uk/hosepipe.
