A 79-year-old South Australian man has been charged with intentionally lighting four grass and scrub fires in the state's southeast in recent days.

Police will allege the man lit fires on December 30 and January 2, and then two on Saturday, all in the Kingston area.

In the video above: Bushfires continue to rage across Australia

He has been refused police bail and will appear in Mount Gambier Magistrates Court on Monday.

No property damage was caused by the fires, however, a house did come under threat during one on Saturday.

More from 7NEWS.com.au on the bushfire crisis:

Police said the charges did not relate to the large Keilira fire which was sparked in the southeast on January 30 with that blaze not considered suspicious.

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