Dominic Perrottet has asked the federal government to fund half of a $1.6 billion Warragamba dam wall project that would protect communities from flooding.
A severe weather warning remains in place for Sydney and surrounding NSW regions after a day of widespread chaos, flash flooding, closed roads and thousands of evacuations.
Most schools across the Penrith Local Government Area will be closed tomorrow as the rain that has soaked the region for the past week delivers its finale - with some 150mm expected.