Crews still working to connect power to NSW homes after Thursday's storms

Crews have worked through the night trying to reconnect the almost 10,000 NSW homes that are still without power following storms that battered parts of Sydney.

Following Thursday afternoon's wild weather powerlines and trees were brought down, including one that hit a car and killed a man in Sydney's west.

Ausgrid and Endeavour Energy are expected to work well into today as they reconnect power to people across Sydney and the Central Coast.

One man died when the car he was travelling in was struck by a large tree at Emu Plains on Thursday.

The 60-year-old female driver of the car was taken to hospital in a critical condition with pelvic and abdominal injuries but is now in a stable condition, a hospital spokeswoman says.

Lightning strikes sparked three fires in the Blue Mountains and is also believed to be responsible for a fire at a power station.

Strong winds also brought down powerlines, cutting power to more than 70,000 people in the city's north, south and western suburbs.

Trees also fell on a house and the roof of a nursing home, while others blocked roads.

The SES recorded more than 1200 jobs by late evening on Thursday, with the majority coming from the Sydney metropolitan region.