Conditions in South Australia have eased allowing firefighters to get the upper hand on multiple bushfires.

There are still five significant blazes burning across the state with two subject to watch and act alerts.

The Bangor fire in the southern Flinders Ranges has burnt more than 19,000 hectares of grassland and destroyed six homes.

The SA Country Fire Service (CFS)say overnight Saturday conditions saw the fire’s spread slowed significantly.

Crews have been able to focus on strengthening control lines.

Another bushfire in the Eden Valley has burnt through more than 24,000ha.

Firefighters have managed to control a number of breakouts from the fire.

More than 60 fire fighters from NSW will help their South Australia counterparts on Sunday with the Eden Valley blaze.

A dramatic drop in fire activity in Riverland has allowed crews to bring two out of five fires in the area under control.

The fire threat has also eased for the Billiat Conservation Park fire, which has burnt through more than 92,000ha.

The total number of homes lost in the fires has risen to 15.

The number could rise further as damage assessment teams explore fire affected areas.

While conditions have eased, residents are urged to be vigilant.

For CFS udpates and warnings, go here.