The Bureau of Meterology has updated a severe weather warning for damaging winds to the Illawarra for late Tuesday.
The bureau warns that winds averaging 50 to 65 km/h with peak gusts of 90 to 100 km/h are forecast for the Illawarra and South Coast - as well as the metropolitan, Hunter, Central Tablelands, Southern Tablelands, Snowy Mountains and ACT - though winds are expected to ease this evening.
Meantime, winds of up to 110 km/h have wreaked havoc across parts of NSW, pulling down trees and ripping roofs from homes.
The SES has responded to more than 500 jobs since 6am on Tuesday.
SES spokeswoman Danielle Wearne said a couple of hundred jobs came in after 1pm.
‘‘Since 6am we have had 453 jobs and a majority have been for trees down and roof damage,’’ she told AAP.
A SES spokesperson later told ABC Radio the number of jobs had risen to about 520.
The SES expect the number of calls for assistance to rise this afternoon as people return home from work to assess their homes.
The organisation reported peak gusts of up to 110 km/h.
The Central Coast has borne the brunt of the gusty winds, including Long Jetty where a roof has been blown off a home and ended up in the middle of a road.
Ms Wearne said the roof also hit other homes as it was blown away.
SES crews have also responded to a mosque in the same area and to a home in Avalon, on the Northern Beaches, where roofs have also been blown off.
Sydney’s western suburbs, the Central West and the Blue Mountains have also experienced damaging winds.
Anthony O’Brien from Ausgrid told ABC Radio there were 25,000 properties in Sydney and 5000 homes and businesses on the Central Coast without power.
Peter Payne from Endeavour Energy also told ABC Radio there were 9300 homes without power in the Blue Mountains, western Sydney and the Hawkesbury area.
The Bureau of Meteorology forecast average winds of 65 km/h for metropolitan Sydney, southeastern NSW and Australia Capital Territory to hit at about midday on Tuesday.
Total fire bans are in place for the greater Hunter, northern slopes and northwestern areas.