Flash flooding on Australia's southeast coast has killed three people and cut off towns, isolating tens of thousands of residents, as officials on Thursday warned more downpours were expected over the next 24 hours.

More than 100 schools are closed on Thursday, while thousands of properties remain without power, authorities said. A slow-moving coastal trough has dumped about four months of rain over the past two days,

An Australian town was cutoff by flash flooding after receiving a third of its yearly rainfall in less than a week. Sky News Australia's Jim Callinan joined FOX Weather with a look of the aftermath.