As the worst bushfires in Australia's history raged across Victoria, Twitter, Flickr and Facebook lit up with condolences and horrific first-hand accounts, while many used innovative online mapping tools to assess the risk of the fires reaching their own homes.

Mainstream news outlets, battling to provide comprehensive coverage of the tragedy, have incorporated accounts published on the social networking sites extensively in their reports.

Using online social media to spread vital information and personal stories is becoming increasingly commonplace in times of crisis, but this may be the first time the social networking sites have been used extensively during an Australian disaster.