The Thiele Highway will remain closed overnight due to flooding and severe weather, according to SA Police.
The highway was closed between Eudunda Road and Bower Boundary Road after wild winds brought down a number of trees and the road became flooded.
Due to the weather conditions, the road will remain closed overnight and crews will reassess in the morning.
Motorists are asked to take an alternate route and take care on other roads in the area.
Police urge the community to slow down, drive to the conditions, turn on headlights and never drive or ride through floodwaters.
If you need the State Emergency Service to assist with flood or storm damage then call 132 500 – only call Triple Zero (000) for life threatening emergencies.
For information on road closures, go to www.traffic.sa.gov.au