A major leak on the trunk water mains between Buncrana and Letterkenny is threatening to leave hundreds of householders without water today.
Engineers from Irish Water have arrived at the scene a short time ago and are assessing the situation.
Local county councillor Paul Canning has appealed to the public in the area to conserve water if they can until the situation is rectified.
There is no indication as yet of who bad the leak is or how long it will take to fix it.
Updated: The location of the burst has been identified at Burnfoot and it is hoped the issue will be resolved in the coming hours.
