Hail storm ice the size of golf balls battered Sydney during a summer storm on December 20, 2018.

At least 50,000 homes remain without power in northern Sydney and more than 1000 calls for help are waiting to be responded to by State Emergency Services after Sydney and the NSW central coast were yesterday rocked by the worst hailstorms in almost 20 years.

So far there has been 15,000 insurance claims worth over $80 million of damage to homes and cars, according to the Insurance Council of Australia.