What the mapping shows for Idalia
Part of Idalia is mapped as subject to coastal inundation.
4.2% of Idalia is mapped as part of the Queensland coastal management district (coastal management district declared under the Coastal Management Act 2016)
Queensland Coastal Management District, State of Queensland (Department of Environment, Tourism, Science and Innovation), Creative Commons Attribution 4.0, retrieved 2026-10-23
This is a share of the suburb's land area from a published state dataset, not an assessment of any property. A ClimateNest report scores the individual address across eight hazards, with insurance and value projections to 2050.
Check an address in Idalia →Flood Risk in Idalia, QLD: 2026 Assessment
4.2% of Idalia is mapped as part of the Queensland coastal management district (coastal management district declared under the Coastal Management Act 2016)
That figure covers the suburb. Check whether your address is inside it - address-level, sourced, A$49.
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Flood Risk Score
Not assessedIdalia faces a moderate risk of flooding due to its proximity to the Ross River and other waterways. Climate change is expected to increase rainfall intensity, potentially leading to more frequent and severe flood events.
Key Facts
- Flood Risk
- Idalia faces a moderate risk of flooding due to its proximity to the Ross River and other waterways. Climate change is expected to increase rainfall intensity, potentially leading to more frequent and severe flood events.
- Trend
- increasing
- Suburb
- Idalia, QLD
- Overall Risk
- Medium
- Postcode
- 4811
Flood Risk Analysis
Idalia, located in Queensland, 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 Queensland.
Several properties in Idalia are located within close proximity to the Ross River, increasing their susceptibility to flooding during periods of heavy rainfall.
Idalia faces a moderate risk of flooding due to its proximity to the Ross River and other waterways. Climate change is expected to increase rainfall intensity, potentially leading to more frequent and severe flood events.
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 Idalia. An address-level check is what tells you about a specific property before you buy, sell or insure it.
Local Hazard Evidence
Historical Events
The Townsville floods of 2019 caused widespread damage in Idalia, with many homes inundated by floodwaters. The Ross River Dam was at capacity and released large volumes of water.
Heavy rainfall caused flooding in parts of Idalia, with some roads and properties affected.
Adaptation & Mitigation Actions
Improve Flood Defenses
Near-termInvest in infrastructure improvements to protect against flooding, such as levees, drainage systems, and flood-proofing of buildings.
Est. cost: High
Develop a Heatwave Management Plan
ImmediateImplement a heatwave management plan to protect vulnerable populations, including early warning systems, cooling centers, and public awareness campaigns.
Est. cost: Medium
Enhance Bushfire Preparedness
Near-termImplement measures to reduce the risk of bushfires, such as clearing vegetation around homes, creating firebreaks, and educating residents about bushfire safety.
Est. cost: Low
Promote Water Conservation
Long-termEncourage water conservation to reduce the strain on water resources during periods of drought and heatwaves.
Est. cost: Low
Council & Emergency Services
Explore Idalia Risk Reports
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Frequently Asked Questions
Is Idalia at risk of flooding?
Based on available data, Idalia 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 Idalia?
Insurance costs for flood cover in Idalia 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 Idalia?
Yes, flood risk can affect property values in Idalia. 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 Idalia?
Elevation is a critical factor in flood risk. Properties at higher elevations within Idalia 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 Idalia Safe from Climate Risk?
Enter your address below for an instant climate risk assessment for Idalia, Queensland, covering flood, bushfire, sea level rise and more.
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Full report from A$49 · Australian addresses only · 8 hazard scores · Insurance trajectory · 2030 & 2050 projections