Asbestos is present in one in three Australian homes, as well as public and commercial buildings.This includes hundreds of river shacks and homes, particularly those built or renovated from the mid-1980s to 1990 or earlier. https://www.safework.sa.gov.au/news-and-alerts/news/news/2022/asbestos-danger-rises-with-river-level
River Murray flows are expected to reach up to 220GL per day across the South Australian border into Renmark at Christmas time with the peak high-water level working its way downstream.
Asbestos is dangerous if not disposed of properly. Some older properties that contain asbestos will be washed away and the asbestos containing materials can end up downstream.
Go to https://www.asbestos.sa.gov.au/in-your-home/find-and-identify-asbestos-in-the-home to find and identify asbestos.