Brisbane is once again facing the threat of significant flooding. Heavy rains and storms have arrived, breaking a period of intense heat. This situation brings back memories of past severe flood events, raising concerns for thousands of properties identified as being at risk. The city council has highlighted the potential for both rapid flash floods in creeks and slower river flooding, as detailed in past analyses.
Situation Overview
On Thursday evening, storms arrived in Brisbane, bringing much-needed relief from a week-long heatwave. Temperatures had reached 35 degrees Celsius in the city, and 37 degrees Celsius in nearby Ipswich. The incoming storms, predicted to continue into Friday, bring with them the possibility of heavy rainfall.
The shift in weather is expected to cause a dramatic temperature drop, with Friday's maximum potentially being 10 degrees Celsius cooler than Thursday.
A severe thunderstorm warning was issued on Thursday evening, highlighting the risk of heavy rainfall.
Historical Context of Flooding
Brisbane has a history of severe flooding, with past events providing a stark reminder of the potential dangers.
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In one recorded instance, the Brisbane River peaked at 3.85 metres.
Another severe flood event saw the Brisbane River reach record heights of 8.35 metres.
The Brisbane City Council has identified 20,000 properties as being at risk of storm surge and flooding from both the Brisbane River and local creeks.
Types of Flooding in Brisbane
The city's geography means it is susceptible to different kinds of flooding:
Flash Flooding: This occurs rapidly in creeks and is often localized. It can be swift and dangerous.
River Flooding: This is a slower-moving form of flooding associated with the Brisbane River, often occurring after prolonged rainfall.
Evidence
"Storms hit Brisbane as residents brace for possible flooding" - The Age
Thursday evening saw heavy rain and storms in Brisbane. This marked an end to the prolonged heat.
Rainfall is expected to continue on Friday, with a possibility of heavy downpours continuing until 6 pm.
A severe thunderstorm warning was issued around 6 pm on Thursday.
Temperatures are predicted to drop significantly, with Friday potentially being 10 degrees cooler than Thursday.
Expert Analysis
While specific expert quotes are not available in the provided data, the repeated mention of historical flood levels and the council's risk assessment indicate a clear and present danger. The contrast between the recent heatwave and the incoming storms underscores the volatile weather patterns that can affect the region. The differing speeds of flash flooding versus river flooding are critical factors for public safety messaging and preparedness.
Conclusion
Brisbane is currently experiencing a transition from a significant heatwave to storms bringing heavy rainfall. This weather pattern carries a notable risk of flooding, affecting areas along the Brisbane River and local creeks. The city has a documented history of severe floods, and current assessments indicate a substantial number of properties are vulnerable. Residents are advised to remain aware of weather warnings and understand the different types of flood risks they may face.
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Sources:
The Conversation: "Brisbane is bracing for floods yet again. History shows residents should remain on very high alert" - Published: Mar 8, 2025. https://theconversation.com/brisbane-is-bracing-for-floods-yet-again-history-shows-residents-should-remain-on-very-high-alert-251719
The Age: "Storms hit Brisbane as residents brace for possible flooding" - Published: 9 hours ago. https://www.theage.com.au/national/queensland/flooding-in-brisbane-possible-as-storms-predicted-to-end-heat-20260212-p5o1pk.html
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