Irish Water is urging homeowners to conserve water amid soaring temperatures this week.
It's come as the utility says the sunny weather has led to "exceptional demand" on its network.
A High-Temperature Advisory is set to remain in place until Friday with conditions set to stay very warm until then.
Water supply in areas such as Donegal, Kerry, Meath, Dublin, Laois, and Wexford is low.
As a result, Irish Water has issued an urgent appeal to the public to conserve water by taking shorter showers and avoiding paddling pools.
Homeowners are also being urged to reuse water collected from showers to water the garden.
Night-time water restrictions are in place in a number of counties in an effort to refill reservoirs.