Sydney hit by deluge of rain amid unseasonable warmth

A sudden deluge of rain has caused flooding in parts of Sydney.

The front moved in quickly on Sunday afternoon, swallowing the city and northern suburbs.

In Cremorne on the North Shore, four shops and the apartments above were inundated by water in the first rain for weeks.

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"I don't understand how one storm can cause all this wet," Belinda Gazzonli said.

The owner of I Love Pizza was worried about valuable ovens and fridges inside and so closed early.

"Everything is flooded. What am I going to do now?" Jay Valca said.

Residents won't be returning for at least tonight as urgent repairs are carried out on the roof.

Roads were also swamped across the city.

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At Narrabeen, on the northern beaches stormwater drains didn't cope on Pittwater Road.

The wet weather came after an unusually warm Saturday in the city.

It was 23 on Saturday, around six degrees more than average.

There's also chance of a shower on Monday, but the rest of the week will remain warm with a high of 21 on Tuesday.

Meanwhile, a cold front will roll across Australia from east to west in the coming week, bringing another wave of winter temperatures for many.