According to some predictions, Perth property prices could be worthless in the future if Perth becomes the world's first 'Ghost City'.

Perth is set to become the world's first 'Ghost City' according to a long-term weather forecaster and a news anchor.

The doomsday forecast for Western Australia's capital was made on FOX News in the United States.

During an interview a FOX News anchor interpreted a global climate forecast map with drastic consequences for Sandgropers.

"It seems as though Perth, Australia, is a real cautionary story for us. Tell us what's happening in Perth and how Perth could become what's called a ghost city?" asked the news anchor.

"I'm reading here that unless drastic action is taken, Perth could become the world's first ghost city - a modern metropolis abandoned by the 1.7 million people there for lack of water," she said.

The interviewee, US senior climate forecaster and drought expert Ed O'Lenic, was slightly more restrained when describing the future of our city.

"Water is becoming an increasing issue in the city of Perth and there is some concern about the sustainability of the city." Mr O'Lenic said.

"Droughts tend to build over a relatively long period of time, it takes months, seasons and even years for a drought to develop; and they're always changing."

The gloomy prediction seems far-fetched, especially as Rottnest Island was receiving its highest recorded rainfall figure for July.

Bureau of Meteorology Forecaster John Relf said a cloud band hovered over Rottnest Island dumping 32.2 millimeteres in half an hour and 66.8mm in a 24 hour period.

"This was a once in a 50, or even 100 year event," he said.

However, Perth missed out on much of the rain recording only 4.2mm in the same period.

"Perth has a long way to go to reach the July average," Mr Relf said. "Perth's only had 75.6mm and we only have a week or so to get to the average of 169.7mm."

After Perth's record breaking heatwave, low dam levels and more dry conditions predicted - the crazy idea of a creeping drought may not be so crazy after all.

Regardless, the audio from the FOX News segment is worth a listen.