Some education facilities across the Fleurieu Peninsula have closed for Wednesday, November 20 due to the 'catastrophic' fire danger rating.
Mount Compass Area School, Mount Compass Preschool Centre, Rapid Bay Primary School, Yankalilla Area School, and Yankalilla Community Children's Centre have all shut their doors for the day.
The government school bus service has also been cancelled.
The Department of Education has a Bushfire and Emergency Hotline at 1800 000 279, which parents can call for information about planned school closures as a result of bushfire activity.
There is a total fire ban statewide with a 'catastrophic' fire danger rating for the Mount Lofty Ranges, which includes the Fleurieu Peninsula.
The Country Fire Service (CFS) says in fire ban districts with a fire danger rating of 'catastrophic', well prepared, well constructed and defended homes may not be safe during a fire, and to ensure survival, people should leave early in the morning.
The CFS recommends people in 'catastrophic' conditions should implement their Bushfire Survival Plan.
Some towns across the Fleurieu are predicted to break temperature records.
According to the Bureau of Meteorology, Milang will hit 43 degrees, Victor Harbor, Strathalbyn and Goolwa 42 degrees, Yankalilla 41 degrees, and Cape Jervis 38 degrees.
The Bureau says very hot and strong to gale force north to northwesterly winds are expected over the Fleurieu during Wednesday ahead of a vigorous cold front.
Damaging winds averaging 60-70 km/h with peak gusts of around 90 km/h, are forecast to develop during the morning with the strongest winds expected from around midday to mid-afternoon.
A statewide Code Red extreme weather response has been activated for people sleeping rough due to the heat and wind.
Housing SA and its non-government partners have made more accommodation and services available for extended hours for homeless people in the hot weather.
Anyone on the Fleurieu who requires services is urged to call the Homelessness Gateway, which operates 24/7, on 1800 003 308.