Multiple emergency alerts are in place across Queensland as large bursts of rain and severe thunderstorms continue across the state's south-east and northern New South Wales.

Hundreds of thousands of people in Australia's Queensland state were without power on Sunday after Alfred, a downgraded tropical cyclone, brought damaging winds and heavy rains, sparking flood warnings.

Thousands of Queensland residents were left without power on Sunday after Cyclone Alfred, a downgraded tropical cyclone, caused widespread damage across the state.