Australian Government Bureau of Meteorology, National Water Operations Initial Minor Flood Warning For The Upper Onkaparinga River Issued at 02:30 PM ACST on Wednesday 17 June 2026 Flood Warning Number: 1 MINOR FLOODING POSSIBLE AT OAKBANK FROM WEDNESDAY EVENING Moderate rainfall totals have been recorded over the Onkaparinga River catchment over the last few days, causing small river and creek rises. Further rainfall is forecast for the remainder of Wednesday and into Thursday, which may cause the upper Onkaparinga River at Oakbank to exceed the minor flood level from Wednesday evening. Note: The minor flood level at Oakbank was lowered from 2.10 m to 1.17 m in December 2025. Upper Onkaparinga River above Verdun: Minor flooding is possible along the upper Onkaparinga River above Verdun. The Onkaparinga River at Oakbank is currently at 0.25 m and steady, below the minor flood level. With forecast rainfall, the Onkaparinga River at Oakbank may exceed the minor flood level (1.17 m) from Wednesday evening. Further rises are possible overnight Wednesday into Thursday with forecast rainfall. Flood Safety Advice: Don't drive, walk, swim or play in floodwater because it is dangerous. Stay away from flooded drains, rivers, streams and waterways. Obey road closure signs. Plan ahead so you don't drive on flooded roads. Check the ABC and local media for updates. The situation can change quickly, so stay informed. For local emergency management warnings and advice visit www.ses.sa.gov.au/incidents-and-warnings/incidents-and-warnings-map/.} For emergency assistance call SES on telephone number 132 500. In life-threatening emergencies, call 000 (triple zero) immediately. Next issue: The next warning will be issued by 11:00 AM ACST on Thursday 18 June 2026. Latest River Heights: Onkaparinga River at Charleston,0.08,steady,1:46 pm Wed 17/06/26 Onkaparinga River at Woodside,0.17,steady,12:46 pm Wed 17/06/26 Western Branch Creek at Tiers Road,0.01,steady,11:44 am Wed 17/06/26 Lenswood Creek at Swamp Road,0.22,steady,11:32 am Wed 17/06/26 Onkaparinga River at Oakbank,0.25,steady,11:57 am Wed 17/06/26 Onkaparinga River at Verdun,-0.72,steady,2:25 pm Wed 17/06/26 Aldgate Creek at Aldgate (Euston Rd),1.32,steady,1:53 pm Wed 17/06/26 Onkaparinga River at Houlgraves,3.65,steady,2:25 pm Wed 17/06/26 Onkaparinga River at Clarendon Weir,9.08,steady,9:13 am Wed 17/06/26 Onkaparinga River at Old Noarlunga,1.16,steady,2:05 pm Wed 17/06/26 This advice is also available by dialling 1300 659 219. Warning, rainfall and river information are available at http://www.bom.gov.au/australia/flood.