More than 1,500 pupils have been sent home from the William Howard School in Brampton after problems with the water supply.
Engineers from United Utilities have been working with local contractors to try and establish the fault.
Pupils were sent home after after registration at 9.20am.
More top news
A look ahead at the forecast for the Border region.
An inspirational Cumbrian girl who won the 2015 WellChild Awards, is calling on others from the region to enter this year's event.
Three men have appeared in court, charged with drugs offences, as part of a probe into the death of a teen who fell ill at Kendal Calling.