Mini-tornado rips roofs from homes and warehouses and leaves trail of destruction as devastating storm smashes the NSW Central Coast after blistering heatwave

Wild weather has ravaged parts of Australia with damaging winds blowing roofs off homes leaving properties destroyed and thousands left without power. 

Devastating storms lashed parts of the Entrance and Long Jetty, on the NSW Central Coast, around 4pm on Saturday, with one person trapped under debris inside a home. 

The factory's roof blew onto a home with the person believed to be inside the property. 

Trees and powerlines collapsed across several roads in the area as the town was hit by flash flooding. 

The weather bureau said the damage was caused by an 'intense' and 'fast moving' storm which quickly moved through the area this afternoon. 

‘Storms are moving to the east and southeast towards the coast,’ the bureau warned.

A severe weather warning for the metropolitan and Illawarra districts was issued late on Saturday as the cool change arrived. 

Winds of 70km/h were expected to reach the CBD on Saturday evening, with potential gusts of up to 90km/h.

A warning for severe thunderstorms threatening large hail and damaging winds is also in place for the Hunter, South Coast, Snowy Mountains and Mid-North Coast forecast districts. 

The cool change comes after parts of NSW coast sweltered through 40 degree heat.  

Penrith and Richmond in Sydney's west hit 43C while Badgerys Creek notched up  44C making the highest recorded temperature in the city today. 

Forbes and Condobolin in the state's Central West also reached 44C. 

The NSW Rural Fire Service issued total fire bans for five state districts including Sydney, with several dozen fires burning but none out of control. 

Earlier, the heat prompted warnings to 100,000 music fans heading to Sydney's Olympic Park precinct to attend concerts by the Foo Fighters and 50 cent and the EPIK indoor music festival.