Parts of regional NSW could run out of water as early as November as the state faces a drought of “unprecedented proportions”.

Projections from the state’s river operator and bulk water supplier WaterNSW have revealed the worst-case scenario for NSW if there’s no significant rainfall or government intervention.

Under the worst-case scenario, the first towns to lose water supply will be Dubbo, Cobar, Nyngan and Narromine in November when the Macquarie River is forecast to run dry.