Flood Risk in Grange, SA: 2026 Assessment
Is Grange Safe from Climate Risk?
Enter your address below for an instant climate risk assessment for Grange, South Australia, covering flood, bushfire, sea level rise and more.
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*Industry sources: ICA, APRA, RBA
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Flood Risk Score
Not assessedGrange faces a moderate risk of flooding due to its low-lying coastal location and proximity to the Patawalonga River. Intense rainfall events can lead to stormwater runoff exceeding drainage capacity.
Key Facts
- Flood Risk
- Grange faces a moderate risk of flooding due to its low-lying coastal location and proximity to the Patawalonga River. Intense rainfall events can lead to stormwater runoff exceeding drainage capacity.
- Trend
- increasing
- Suburb
- Grange, SA
- Overall Risk
- Medium
- Postcode
- 5022
Flood Risk Analysis
Grange, located in South Australia, has a location-specific flood risk profile based on available data including proximity to waterways, elevation, and historical flood events. The Bureau of Meteorology (BOM) maintains river height and flood warning data for catchments across South Australia.
The Patawalonga River can overflow during heavy rainfall, impacting properties near the riverbanks.
Grange faces a moderate risk of flooding due to its low-lying coastal location and proximity to the Patawalonga River. Intense rainfall events can lead to stormwater runoff exceeding drainage capacity.
For a comprehensive property-specific flood assessment including address-level elevation data, flood overlay mapping, and insurance cost estimates, use the ClimateNest full analysis tool. General suburb data cannot replace a site-specific evaluation.
ClimateNest assesses hazards at the address rather than the suburb, because exposure varies street by street within Grange. An address-level check is what tells you about a specific property before you buy, sell or insure it.
Local Hazard Evidence
Historical Events
Heavy rainfall caused localized flooding in low-lying areas of Grange.
Adaptation & Mitigation Actions
Improve stormwater drainage
Near-termUpgrade stormwater infrastructure to handle increased rainfall intensity and reduce flood risk.
Est. cost: Medium
Implement heatwave early warning system
ImmediateDevelop a system to alert residents of impending heatwaves and provide guidance on staying safe.
Est. cost: Low
Protect coastal areas from erosion
Long-termImplement coastal protection measures such as seawalls and dune restoration to mitigate erosion.
Est. cost: High
Promote water conservation
Near-termEncourage residents to conserve water through rebates and education programs to reduce strain on water resources during droughts.
Est. cost: Low
Community education on climate risks
ImmediateConduct workshops and distribute information to raise awareness about climate change impacts and adaptation strategies.
Est. cost: Low
Council & Emergency Services
Explore Grange Risk Reports
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Frequently Asked Questions
Is Grange at risk of flooding?
Based on available data, Grange has a location-specific flood risk profile. Flood risk varies by address — check your specific property for precise flood zone mapping and elevation data with ClimateNest.
What flood insurance costs can I expect in Grange?
Insurance costs for flood cover in Grange depend on the property's flood zone classification, elevation, and proximity to waterways. ClimateNest provides address-level insurance cost estimates based on your property's specific hazard exposure.
Does flood risk affect property values in Grange?
Yes, flood risk can affect property values in Grange. Properties in mapped flood zones may experience lower buyer demand, reduced valuations, and higher insurance costs. Lenders increasingly assess flood exposure as part of mortgage risk evaluation.
How does elevation affect flood risk in Grange?
Elevation is a critical factor in flood risk. Properties at higher elevations within Grange typically have lower flood exposure than those near waterways or in low-lying areas. Address-level elevation data combined with BOM flood mapping provides the most accurate picture.
Is Grange Safe from Climate Risk?
Enter your address below for an instant climate risk assessment for Grange, South Australia, covering flood, bushfire, sea level rise and more.
What A$49 could save you from
*Industry sources: ICA, APRA, RBA
Full report from A$49 · Australian addresses only · 8 hazard scores · Insurance trajectory · 2030 & 2050 projections