A massive storm lashed Sydney and the surrounding areas overnight into Wednesday, bringing unseasonal snow, gusting winds and torrential rain.

The severe weather diverted flights from Sydney, closed roads, brought down trees and resulted in an unseasonal snow storm in the Blue Mountains.

The SES originally had more than 2,000 calls for help, including people needing to be rescued after driving into floodwaters.

– NZ Herald, Weatherzone, AP