According to DailyMail, yesterday night, Australian thunderstorms and hailstorms struck, causing flooding in some areas, power outages, and large-scale clean-up work is currently underway. There may be more storms this afternoon.
On Tuesday night, around 30,000 lightning strikes hit much of NSW, including Australia's south coast, Sydney, Hunter Valley and Illawarra.
A video of the drive showed a lightning bolt hitting a nearby car in Narellan, west of Sydney.
Subsequently, hundreds of photos and video clips circulated on social media.
However, weather forecasts show that the temperature is moderate and the weather is sunny during Australia's National Day.
Victoria has also been hit by severe weather, with the state's emergency services receiving hundreds of calls for help, 116 in Geelong alone.
Melbourne was also hit hard, with more than 6,000 residents seeking help saying there was no electricity.
The Australian Bureau of Meteorology said that at present, warm and humid air currents are not stable, so thunderstorms are caused in coastal areas.
The storm hit, and at 9.30pm at Shellharbour Airport (an area south of Sydney), gusts reached 93km/h.
Parts of NSW were hit by heavy rains, including Kempsey, Gosford, Cessnock, Penrith, Parramatta and Kulnura.
Sydney's western and southern highlands were also hardest hit, with high winds, torrential rain and hail hitting parts of suburbs and towns.
At 8pm, a storm hit Camden (southwest Sydney), turning streets into rivers and grass covered with hail.
Hail the size of golf balls was reported in some suburbs.
Due to heavy rain, the roof leak in the community was badly and SES NSW received around 50 emergency calls.
After the flooding broke out and a car was trapped, SES teams were called to Cox Avenue in Kingswood for rescue operations.
An SES spokesman said several other vehicles were also trapped in floodwaters when rescue teams arrived at the scene.
The flooded residents have been rescued and there are no casualties so far.
Earlier in the day, the weather in Sydney was clear, and the Bureau of Meteorology expected temperatures in and around Sydney to return to their original conditions on Australian Day.
In Victoria, a storm hit the Bellarine Peninsula at around 2.15pm on Tuesday, bringing strong winds and downpours and flooding in the western part of the state.
In the Gellibrant Mountains (about 67 km west of Geelong), rainfall reaches 29 mm in 30 minutes.
As the thunderstorm moved eastward, Melbourne was hit by flooding around 5pm.
Parts of the city were hit by heavy rainfall and damaging winds, and locals said lightning could be seen throughout the afternoon.
In Montrose (east of the city), rainfall reaches 23 mm in 30 minutes.
The Bureau of Meteorology said that the current hot and humid air flow is unstable, so Melbourne has been hit by thunderstorms.
National Emergency Services recommended that flooding could wash away trees and sweep away utility poles, and that residents of storm-affected communities should stay indoors, away from windows and avoid travel as much as possible to avoid potential hazards.
The Bureau of Meteorology said it would be cloudy in parts on Wednesday, with maximum temperatures of 28°C in Melbourne and Geelong.
Ahead of Australia's Day, the weather will improve in most areas, with 31°C in Perth, 29°C in Adelaide, 32°C in Sydney, Canberra and Darwin and 33°C in Brisbane.
However, temperatures will be lower in Melbourne and Hobart on Thursday, reaching 22°C and 21°C respectively.