Four people are rescued from flash flooding in northern New South Wales as emergency services respond to 250 calls for help as heavy rain hits parts of the country.

Rural residents are celebrating after storms brought heavy rain to the region and spirits are high for more of the wet stuff.

Parts of Queensland receive a month's worth of rain but the wet weather is set to ease over the weekend.

Severe thunderstorms and heavy rainfall are set to hit large parts of Australia, with NSW, Victoria, and Queensland forecast for wild weather until Friday.

There are increasing flood fears for many towns in NSW, even as this week's record rain begins to ease for much of the state.

November rain records have already been smashed through Australia's west and centre — now, heavy rain and erratic storms are shifting towards northern NSW and southern Queensland.