Severe conditions as mercury rises in SA

The Country Fire Service says parts of SA will have severe bushfire conditions on Thursday.

Adelaide temperatures are set to soar with severe bushfire conditions in three other SA districts. (AAP) Source: AAP

Severe bushfire conditions have been declared for three South Australian districts as temperatures surge into the mid- to high-30s.

The Country Fire Service says conditions will be severe in the mid-north, the Mount Lofty Ranges and in the Riverland on Thursday.

The Bureau of Meteorology says Adelaide should have a top temperature of 36C with the mercury to push into the 40s in the north.

Both Moomba and Oodnadatta are forecast to have tops of 41C.

But the bureau says the hot conditions for the southern part of the state will be shortlived with a cool change to sweep across SA on Friday.