Thousands of Sydneysiders face another night without power after severe thunderstorms hit Sydney, Newcastle and Wollongong.
Around 2900 homes and businesses in Sydney's south were still without power on Tuesday evening after 14,000 Ausgrid customers lost power when strong winds, lightning and hail struck the Sutherland Shire and northern beaches on Monday.
"Customers still without power should plan to be without power for dinner this evening and make alternative arrangements," Ausgrid said in a statement.
"Due to the level of damage and the complex repairs required, power supply in some areas won't be restored before tomorrow and crews will be working through the night to continue repairs."
The NSW SES responded to more than 800 calls overnight on Monday.
A severe thunderstorm warning for large hailstones and damaging winds was issued by the Bureau of Meteorology on Tuesday evening for parts of the state's northern rivers district from Byron Bay to Tweed Heads.
Damaging winds are also expected in the state's south and west, including the Snowy Mountains and ACT.
A total fire ban is in place on Wednesday for the south western and far western fire districts which are also under "severe" fire danger, as well as the north western district.
A spike in heat is expected for Thursday and Friday which, along with strong, gusty winds, will bring increased fire risk to NSW and the ACT, the bureau said.
A 16-year-old boy and 24-year-old man have both been discharged from hospital after being hit by lightning in the Blue Mountains on Monday
Australian Associated Press