Fire rips through stubble near Gawler north of Adelaide amid day of extreme danger

While the threat has reduced, the CFS said, crews remain at the scene and on high alert across the state. (ABC News: Isabel Dayman)

The threat from a bushfire burning near the town of Gawler and Adelaide's northern fringes has reduced, but the Country Fire Service (CFS) is continuing to battle the blaze which has burned through hay and stubble.

An emergency warning was earlier issued for the fire at Kangaroo Flat which broke out this morning near a major highway, and has travelled in a southerly direction towards Ward Belt and Gawler.