Paul Bryce, Head of Water, NI Water, said: “By making small changes, we can all help reduce water use while staying cool.
“Our Water Treatment Works are designed to treat a finite volume of water and if thousands of households are all trying to use large quantities at the same time, the treatment works, and distribution system can begin to struggle to keep up with demand.
“You may be using more water intensive equipment, such as power hoses, sprinkler systems, large pools.
“Coupled with the fact that a lot of people will be enjoying the bank holiday weekend, it can lead to a massive demand for water that our treatment works simply cannot supply,” Mr Bryce said.