A wildfire that roared into the community of Jasper, Alta., late Wednesday has left vast stretches of the townsite incinerated.

Video shared to social media on Thursday shows blocks upon blocks of buildings have been levelled by fire.

The video, taken from inside a truck, shows a view of a community forever changed.

Where buildings once stood, charred rubble remains. Many homes in the historic townsite have been destroyed, leaving only the foundations.

"We are seeing potentially 30 to 50 per cent structural damage," (Premier Danielle) Smith said.