๐Ÿ“ฎ Harristown postcode: 4350

Flood Risk in Harristown, QLD: 2026 Assessment

Harristown, Queenslandยท Toowoombaยท 4350
Harristown faces a moderate risk of flooding due to its location within the Toowoomba region. Several waterways and historical flood events contribute to this risk. Climate change is expected to increase rainfall intensity, potentially worsening flood events.Updated 31 Mar 2026

Flood Risk Score

6.0/10

Harristown faces a moderate risk of flooding due to its location within the Toowoomba region. Several waterways and historical flood events contribute to this risk. Climate change is expected to increase rainfall intensity, potentially worsening flood events.

Key Facts

Flood Risk
Harristown faces a moderate risk of flooding due to its location within the Toowoomba region. Several waterways and historical flood events contribute to this risk. Climate change is expected to increase rainfall intensity, potentially worsening flood events.
Trend
increasing
Suburb
Harristown, QLD
Overall Risk
Medium
Postcode
4350
Highest high-risk exposure
22.4% of land (tropical cyclone)

Flood Risk Analysis

Harristown, located in Queensland, has a notable 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.

Historical flood data indicates that parts of Harristown have been affected by flooding in the past. The Toowoomba Regional Council provides flood maps and information to residents.

Harristown faces a moderate risk of flooding due to its location within the Toowoomba region. Several waterways and historical flood events contribute to this risk. Climate change is expected to increase rainfall intensity, potentially worsening 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.

Harristown sits within ClimateNest's suburb-level hazard model for flood risk. 14.5% of the suburb's land area is mapped in high-risk flood zones and 68.3% in moderate-risk zones, based on the national hazard overlay. Exposure at this scale varies street by street, which is why an address-level check matters before you buy or insure a specific property in Harristown.

Harristown (postcode 4350) is tracked in ClimateNest's suburb hazard model, which maps the share of the suburb's land exposed to each hazard at high and moderate levels. The suburb's highest high-risk exposures are tropical cyclone (22.4% of land in high-risk zones), riverine flood (14.5% of land in high-risk zones), extreme wind (8.8% of land in high-risk zones). Exposure is not uniform across Harristown โ€” individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.

Local Hazard Evidence

Nearest WaterwayGowrie Creek
Elevation Range600-700m
Flood Zone ClassificationAreas adjacent to Gowrie Creek are susceptible to flooding.

Historical Events

2011
Major

The 2011 floods in Toowoomba caused significant damage and disruption, affecting parts of Harristown. Gowrie Creek overflowed, inundating homes and businesses.

Adaptation & Mitigation Actions

Improve Flood Defenses

Near-term

Invest in infrastructure improvements to mitigate flood risk, such as upgrading drainage systems and building flood levees.

Est. cost: High

Implement Heat Action Plans

Immediate

Develop and implement heat action plans to protect vulnerable populations during heatwaves, including establishing cooling centers and providing public awareness campaigns.

Est. cost: Medium

Enhance Bushfire Preparedness

Long-term

Implement bushfire risk reduction measures, such as vegetation management and community education programs.

Est. cost: Medium

Promote Water Conservation

Near-term

Encourage water conservation measures to reduce water stress during droughts and heatwaves.

Est. cost: Low

Council & Emergency Services

Toowoomba Regional Council
Emergency Services

Data last updated: 31 March 2026

Explore Harristown Risk Reports

Frequently Asked Questions

Is Harristown at risk of flooding?

Based on available data, Harristown has a notable flood risk profile. Flood risk varies by address โ€” check your specific property for precise flood zone mapping and elevation data with ClimateNest.

What flood insurance costs can I expect in Harristown?

Insurance costs for flood cover in Harristown 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 Harristown?

Yes, flood risk can affect property values in Harristown. 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 Harristown?

Elevation is a critical factor in flood risk. Properties at higher elevations within Harristown 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.

What share of Harristown is exposed to high tropical cyclone risk?

ClimateNest's hazard overlay maps 22.4% of Harristown in high-risk zones for tropical cyclone, with a further 60.9% in moderate-risk zones. Suburb-level exposure is not uniform โ€” individual properties can differ from these averages, so an address-level check is recommended.

Is Harristown Safe from Climate Risk?

Enter your address below for an instant climate risk assessment for Harristown, Queensland, covering flood, bushfire, sea level rise and more.

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What A$69 could save you from

$7.2B
2022 insured disaster losses*
$300B+
climate risk to property by 2050*
30-120%
insurance premium increases in high-risk areas*

*Industry sources: ICA, APRA, RBA

Full report from A$69 ยท Australian addresses only ยท 8 hazard scores ยท Insurance trajectory ยท 2030 & 2050 projections