Scottish Water has restored supplies to around 36,000 properties in Renfrewshire and Inverclyde following a burst water main.
The utility firm said customers woke up on Thursday morning to loss of supply, low pressure or discoloured water after a 24-inch strategic main close to the A726 in Erskine ruptured.
Affected areas included Paisley, Erskine, Gockston, Shortroods, Ferguslie, Inchinnan, Bishopton, Port Glasgow, Greenock and Old Kilpatrick.
In an update on Thursday afternoon, a Scottish Water spokesperson said: “We were quickly able to isolate the water main and begin the process of restoring supplies by diverting water from other parts of the network.
“Given the large number of households affected this will have taken some time but we are confident we have now completed that process.
“The damaged section of pipe is now being repaired and once that is completed it will be reconnected to the network.”
The burst occurred close to the Barrholm Roundabout just after midnight and caused some localised flooding.
Scottish Water added: “The road remains closed for the time being but will reopen as soon as possible after the water main repair has been completed.
“Scottish Water would again like to apologise for any inconvenience that has been caused and to thank customers and road users for their patience and understanding.”