Sydney floods impact 50,000 around Australia's largest city

Hundreds of homes have been inundated in and around Australia's largest city in a flood emergency that was impacting 50,000 people, officials said Tuesday.

Emergency response teams made 100 rescues overnight of people trapped in cars on flooded roads or in inundated homes in the Sydney area, State Emergency Service manager Ashley Sullivan said.

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Days of torrential rain have caused dams to overflow and waterways to break their banks, bringing a fourth flood emergency in 16 months to parts of the city of 5 million people.

The New South Wales state government declared a disaster across 23 local government areas overnight, activating federal government financial assistance for flood victims.

Evacuation orders and warnings to prepare to abandon homes impacted 50,000 people, up from 32,000 on Monday, New South Wales Premier Dominic Perrottet said.