Farmers are among the hardest hit by the drought, which is the driest and most widespread in the state since 1965.
According to Minister for Primary Industries Niall Blair, the latest drought update confirms what many farmers across the state have seen, with only 0-10mm of rain recorded over the past month in the Western, North West and Central areas of NSW. Others have been forced to shoot starving cattle.
Much of Australia's southeast is struggling but the state government said 100pc of New South Wales' more than 800,000 square kilometres was in drought.
"They are shooting their stock because they don't want them to suffer".
Farmers have also had to ration water for their families and their herds because the dams on their properties are dry or almost empty.
4 On Wednesday, authorities in New South Wales announced that the most populous state in the country, which contributes to about a quarter of Australia's agriculture output, is now entirely in drought.
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The state government last month quietly amended its drought map in response to fierce criticism from farmers without a green blade of grass, whose properties were categorised as being merely in "drought onset".
The federal and NSW state governments are providing more than A$1.5 billion (S$1.52 billion) in drought relief packages, created to offset the cost of feed and freight, and increase access to mental health services for farmers feeling the strain.
James (left) and Harrison O'Brien feed grain to hungry calves at the family's drought-ravaged farm in Five Ways in the middle of NSW.
"All the climate gurus that know all about the weather still can't tell us when (the drought is) going to break. We've just got to plan and hope and pray that it rains".
Grazier Mark Wylie has spent A$30,000 in the past six weeks boring for groundwater, to no avail.
Water diviner Glen Shepherd, who has lived in the town for more than three decades, said these were the driest conditions he had ever seen.