Queensland Infrastructure Damage and Insurance Costs: Floods, Cyclones, and Drought
Research Summary — March 2026
This document covers broader infrastructure damage and insurance costs in Queensland from natural disasters, excluding roads (separate report) and fencing/livestock (separate report). It encompasses power, water, rail, telecommunications, public buildings, agricultural infrastructure, and the insurance affordability crisis.
Major Disaster Costs in Queensland
| Year | Event | Insured Losses (A\() | Total Economic Cost (A\)) | Source | |
|---|---|---|---|---|
| 2010–11 | QLD Floods (Brisbane etc.) | $2.1 billion | $6.7B tangible / $14.1B total | (deloitte-access-economics-2011?) |
| 2011 | TC Yasi (Cat 5) | $1.4 billion | $3.5 billion | (ICA-catastrophe-data-2011?; swiss-re-yasi-2021?) |
| 2015 | TC Marcia | $404 million | $750 million | (ICA-catastrophe-data-2015?) |
| 2017 | TC Debbie | $1.74 billion | $3.5 billion | (ICA-catastrophe-data-2017?; QRA-debbie-2017?) |
| 2019 | Townsville Floods | $1.24 billion | $5.68B (Deloitte, inc. livestock) | (PERILS-townsville-2020?; deloitte-monsoon-trough-2019?) |
| 2022 | SE QLD Floods | $5.56 billion* | $7.7 billion (QLD only) | (ICA-2022-flood?; deloitte-QRA-2022?) |
| 2023 | TC Jasper + Christmas storms | $743 million | ~$1 billion (Cairns SA4: $649M) | (ICA-jasper-2024?; cairns-council-2024?) |
| 2025 Jan–Feb | North QLD Floods | $304 million | >$1.2 billion | (ICA-2025-update?) |
| 2025 Mar | Ex-TC Alfred | $1.5 billion | ~$1.8–2.7 billion | (ICA-2025-update?; sbs-alfred-2025?) |
| 2025 Oct–Nov | SE QLD Spring Storms | $601 million | n/a | (ICA-2025-annual?) |
: Source: ICA catastrophe data, Deloitte Access Economics, QRA reports. *The 2022 figure of $5.56B covers SE QLD + Northern NSW combined; QLD share was the majority but not separately broken out by ICA.
Key observation: Insured losses are typically 30–50% of total economic costs. The uninsured/underinsured gap, infrastructure damage, lost economic activity, and social costs account for the remainder. The 2022 SE QLD flood is the costliest flood in Australian history.
Trend Analysis: Costs Accelerating
National Trend (Deloitte Access Economics / Australian Business Roundtable)
- Current annual cost: $38 billion per year nationally (2024) (deloitte-resilience-2024?)
- Projected 2050: $73 billion/year (low emissions) to $94 billion (high emissions, 3°C) (IAG-deloitte-2024?)
- Cumulative 40-year cost: $1.2 trillion even under low emissions (deloitte-resilience-2024?)
- Cost per household: Increased 73% from the ten-year average to $1,532 in 2021–22 (climate-council-deluge-2023?)
- Trend: Disaster costs have more than doubled since the 1970s (climate-council-deluge-2023?)
Queensland-Specific
- QRA: $29 billion managed since 2011 across 135 events; active program of $14.2B for 2020–25 alone (QRA-annual-report-2025?)
- 2024–25: Record 17 separate disaster events in one year (QRA-2025?)
- Brisbane: 4 major floods in 15 years (2011, 2013, 2022, 2025)
- Average government spending on disaster recovery could be almost seven times higher by 2090 under 3°C (climate-council-markets-2024?)
Power Infrastructure
AER-Approved Cost Pass-Throughs for Energy Queensland
These are documented, audited incremental costs passed through to electricity consumers:
| Event | Network | Approved Amount | Source |
|---|---|---|---|
| TC Jasper (Dec 2023) | Ergon Energy | $24.6 million | (AER-energy-qld-2024?) |
| TC Kirrily (Jan 2024) | Ergon Energy | $15.3 million | (AER-energy-qld-2024?) |
| SE QLD Storms (Dec 2023) | Energex | $11.5 million | (AER-energy-qld-2024?) |
| 2022 Feb–Mar Floods | Energex | $18.1 million | (AER-energex-2023?) |
| Total recent pass-throughs | $69.5 million |
: Source: AER determinations. These represent only incremental costs above normal regulatory allowances. Actual restoration costs are substantially higher.
Scale of Major Restoration Efforts
- TC Alfred (2025): 300,000+ homes and businesses lost power. Described as the “biggest post-disaster power restoration in Queensland’s history” — 500,000 properties affected, 9,000 km of line patrols, thousands of responders (ergon-alfred-2025?)
- TC Yasi (2011): 150,000 homes without power; 480,000 homes/businesses affected at peak. Damage ~$100M+ (ergon-yasi-2011?)
- NQ Floods (2025): 33,000 customers restored; landslides wiped out poles and wires, two substations de-energised (ergon-floods-2025?)
- TC Jasper (2023): ~50,000 customers lost power (ergon-jasper-2023?)
Conservative estimate: $50–100 million per major cyclone/flood event for distribution network restoration. Major events (TC Yasi, TC Alfred) likely exceed $100 million each.
Water Infrastructure
Drought-Driven Investment (Millennium Drought)
The Millennium Drought (2001–2009) drove approximately $7 billion in emergency water infrastructure:
| Project | Cost (A$) | Status |
|---|---|---|
| Gold Coast Desalination Plant (133 ML/day) | $869 million (QLD Govt) | Operating at low capacity |
| Western Corridor Recycled Water Scheme (59 GL) | $2.7 billion | Largely dormant |
| SEQ Water Grid (interconnecting pipelines) | Part of ~$7B total | Operating |
| Total drought-response water infrastructure | ~$7 billion | Many assets underutilised |
: Source: Oxford Economics, Seqwater, QLD Government reports. Often cited as cautionary examples of crisis-driven infrastructure spending (oxford-economics-bulk-water-2026?).
Future Water Investment
- Paradise Dam rebuild: Flood damage necessitated a rebuild at $4.4 billion (up from original $1.2B) (QLD-govt-water-2025?)
- New SEQ Desalination Plant: Planned for delivery by 2035, estimated cost $4–8 billion (seqwater-desalination-2024?)
- QLD Water/Sewage Investment Pipeline: Nearly $6.5 billion over five years (QLD-govt-water-2025?)
Stanthorpe: A Case Study in Drought-Driven Water Costs
In January 2020, Stanthorpe became the first Queensland town to run out of water. The government spent $10–15 million carting water by truck from Connolly Dam for over 12 months (qld-govt-stanthorpe-water-2020?). This single regional town’s emergency water costs exceeded the QRIDA grant maximum by orders of magnitude.
Rail Infrastructure
Key Events
- 2010–11 Floods: Over 28% of the Queensland rail network left twisted and displaced (QRA-2011-floods?)
- TC Debbie (2017): Aurizon coal rail network shut for 5 weeks; multiple miners declared force majeure; repair costs in the hundreds of millions (aurizon-debbie-2017?)
- 2021–22 Floods: QLD Rail crews repaired 4,000+ metres of track; 1,140 tonnes of rock and 2,500 tonnes of ballast (QLD-rail-2022?)
- Ex-TC Koji (2026): 56 repair sites on Mount Isa line; ~13 km track damaged (QLD-rail-koji-2026?)
Rail costs are poorly reported publicly but are embedded in the QRA $29 billion total.
Agricultural Infrastructure (Excluding Fencing/Livestock)
| Event | Losses | Source |
|---|---|---|
| TC Yasi (2011) | $500M sugarcane; $300M agriculture; $2B agriculture+mining+local govt | (swiss-re-yasi-2021?) |
| TC Debbie (2017) | $450M agriculture; $150M sugar industry (35% Proserpine, 20% Mackay crop) | (QRA-debbie-2017?) |
| 2022 SE QLD Floods | $250M+ primary producers (2,250+ affected) | (deloitte-QRA-2022?) |
| TC Jasper (2023) | $100M+ asset damage, Cairns region organisations | (cairns-council-2024?) |
| 2025 NQ Floods | Extensive sugar milling, cane rail, chicken processing damage | (QFF-2025?) |
: Source: QRA, Deloitte, Swiss Re, ICA reports.
Key infrastructure types repeatedly damaged: irrigation systems, farm buildings/sheds, sugar milling and cane rail, horticultural structures, grain storage, chicken processing plants.
2022 SE QLD Floods — Cost Breakdown (Deloitte)
The most detailed per-event cost breakdown available (deloitte-QRA-2022?):
| Category | Cost | Detail |
|---|---|---|
| Homes and commercial businesses | $2 billion | ~18,000 properties |
| Small businesses | $324 million | >4,500 businesses |
| Primary producers | $250 million | >2,250 producers |
| Social and human costs | $4.5 billion | 500,000+ people affected |
| Public infrastructure | $492 million | Roads, bridges, community facilities |
| Total | $7.7 billion | QLD only |
Data Gaps
The most significant data gap is the lack of publicly available per-event cost breakdowns for:
- Power infrastructure (Ergon/Energex total restoration costs, not just AER pass-throughs)
- Water/sewerage infrastructure repair
- Rail infrastructure (Queensland Rail and Aurizon coal network)
- Telecommunications (Telstra/NBN Co)
These costs are embedded within the QRA $29 billion total and within regulated utility allowances, but are rarely reported separately.
References
Government / Regulatory
- QRA Annual Report 2024–25
- AER — Energy QLD Cost Pass-Throughs
- ACCC Northern Australia Insurance Inquiry (2020)
- ACCC Insurance Monitoring Report (2023)
- Australian Reinsurance Pool Corporation — Cyclone Pool
- Deloitte — 2022 SE QLD Floods ($7.7B)
- QLD Government — Stanthorpe Water
- QLD Government — Water Security Program
- Seqwater — New Desalination Plant Investigation
- Australian Federal Budget 2025–26 — Recovery and Rebuild