3,500 people across the state of New South Wales are subject to evacuation orders with three quarters of the state affected by the high water levels.
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His comments at the Defence and Security Forum on Monday came after a £20 billion black hole in the budget for the next decade emerged.
The Foreign Secretary said he thinks the health service should be "at the very top of the list" for a windfall after the UK leaves the EU.
Turning wet and breezy from the west overnight.