Several outback highways remain cut after record-breaking rains in the north of South Australia.
Many tourists are still stranded, either camping in isolated areas or at remote roadhouses after more than 100mm of rain in recent days.
A large section of the Stuart Highway which links South Australia to the Northern Territory remains cut.
South Australian authorities today said the highway between Glendambo and Coober Pedy is closed because of water still over the road.
The remote towns of Roxby Downs, Woomera and Andamooka are connected again after urgent repairs were carried out on the Olympic Dam Highway.
The Stuart Highway has since reopened between Port Augusta and Pimba but remains closed further north.
Travellers have been urged to avoid outback gravel and dirt roads for at least the next week because of flooding.
The SA Department of Infrastructure and Transport is issuing updates on road conditions.
The rail link between South Australia to the Northern Territory and even Perth have been hit as well with rail washouts.
"Due to a slow-moving rain event in South Australia, parts of the Australian Rail Track Corporation network between Adelaide and Tarcoola were flooded and operations have ceased," a spokesman said.
"Repair works are underway.
"Services between Adelaide and Perth and Adelaide and Darwin have been impacted. An estimated time for return to service is yet to be determined," the spokesman said.
"ARTC will provide regular updates on operations as information becomes available."
The closure of the rail and road access to the NT is expected to cause freight delays.
A spokesman for Woolworths said after railway closures due to flooding, along with current supply chain disruptions and absenteeism due to COVID-19, deliveries to its stores in the Northern Territory have been delayed.
"Our teams are working hard to ensure stock is delivered as soon as possible, but our NT customers will regrettably see reduced product availability in our stores," the spokesman said.
"We've re-routed our deliveries via road and are expecting to have trucks arriving at stores across the region over the next 24-48 hours.
"We're also looking at alternative options to deliver stock into our Alice Springs store specifically.
"We know this is frustrating and thank our customers for their patience and understanding. Our thoughts are with all communities who have been affected by flooding in recent days."
The supermarket said because highways were also cut it may re-route trucks from Adelaide through Mount Isa.
Falls of more than 150mm have been recorded in some places in the outback after an upper level low pressure system developed in the Bight between South Australia and Western Australia.
The weather system drew down tropical moisture from northern Australia.
The biggest totals over the past week were - Winter Springs 228.4mm, Kimba 200.8mm, Mt Ive 181mm and Buckleboo 177.6mm.
The Bureau of Meteorology said severe thunderstorms with heavy rainfall are expected to continue this week.
"Flooding is impacting multiple roads and towns so make sure you check the status of road closures before travelling in these areas," a bureau spokesman said.
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