Looming: A large storm cloud covers the Sydney Central Business District on Wednesday
A gigantic storm front moved in over Sydney on Wednesday and residents were quick to upload dramatic pictures of it to the internet.
Huge clouds hundreds of feet high, with some shaped like giant tubes, loomed menacingly over the city during rush hour.
As forecasters warned of heavy rain and flash flooding, Twitter and Facebook became awash with pictures of the looming storm, with one describing the conditions as 'apocalyptic'.
Jason Murray tweeted 'b****y hell' as the storm rolled in. Another wrote: 'Bad time for bike comute home. OK, that's a storm alright.'
Josh Noble thought the clouds reminded him of a certain Hollywood blockbuster.
'It's Independence Day,' he wrote.
Internet sensation: Twitter and Facebook were awash with pictures of the storm
Torrential rain, meanwhile, created severe road delays, with reports of jams several miles in length stretching back from Harbour Bridge.
Weatherzone meteorologist Brett Dutschke told The Sydney Morning Herald: 'Basically we've had the sunniest and warmest day and it's all of a sudden turned quite rainy and thundery... there's storm potential for the next few days.'
Electric atmosphere: Lightning strikes over Sydney Harbour next to the iconic Opera House during the thunderstorm on Wednesday
...some geoengineering goin' on, ya think?