A Code Blue has been reactivated for the Clare, Kadina, Port Augusta, Port Pirie, and Whyalla areas, following very frosty temperatures in the region.
In all five towns, temperatures are expected to again drop to as low as 1 degree overnight.
Code Blue responses to extreme weather conditions aim to reduce the harmful effects on people sleeping rough by connecting them with support services and providing additional services, including increasing shelter options.
The Code Blue will be available until 9am on Saturday.
Anyone who is homeless or at risk of homelessness is encouraged to contact Homeless Connect SA on 1800 003 308.