That’s the key message from the recent flooding disaster in Texas on the 4th July holiday weekend and the stark warning for Australian planners and policy makers. What happened around the Guadalupe River in Kerr County, was catastrophic from dual perspectives of loss of life, and, the failure of preparation and warning procedures. It should highlight to us in Australia, that even in this era of social media and hyper- connectedness, with many learnings from past disasters, we’re still prone to being beaten by the elements. In Texas, the combination of natural events, the physical environment and human failures stacked the odds overwhelmingly against not only campers, hikers and people on the roads, but people just sitting in their homes. Harrowing stories are coming out about people sitting in houses washed off their foundations. Such failures to alert and assist these people and obvious flaws in planning and systems points to a need to ensure that our Australian emergency tools and processes are ready. Australian policy makers and governments will be getting briefed on what happened in Texas, not only on what happened in terms of planning, warnings, preparation, but also a more specific analysis of what sites and terrain match the perfect storm of geography, slope, soils, creek confluences, narrow gorges, rainfall funnels, dry soils. This article takes a high level look at some of the issues.
The obvious starting point would be immediately reviewing the traditional 1-in-100+ methodology of quantifying risk and allocating resources. It’s clear that climate related disasters are happening more often.
In relation to the recent disaster in Texas, you might wonder why people were sleeping in tents, sitting in their homes, driving in their cars, while record levels of rainfall, and torrents of rainwater were churning down multiple creek beds funnelled into the gorges in the Guadalupe River on a obvious collision course. People simply didn’t know the size of the catastrophe.
Here are some key learnings for Australia:
🇦🇺 🔍 1. Don’t underestimate 1-in-100 flood risks in rural and hilly terrain in Australia
Australia’s Great Dividing Range, Blue Mountains, Victorian Alps, Far North QLD, and Tasmanian highlands share key characteristics with Texas Hill Country:
- Impermeable soils and steep terrain
- Sudden convergence of creeks into narrow river systems
- Growing peri-urban development in hazard zones
➡️ We need more detailed flash flood modelling, GIS-based hazard overlays, and localised evacuation triggers based on real topography, not just postcodes. Here are some examples of risk sites, from a basic AI screening:
a. Shoalhaven River, NSW (Kangaroo Valley – Tallowa Dam – Nowra)
- 🏞️ Steep upper catchment in Morton National Park and Budawang Ranges
- ⛺ Numerous campsites near Kangaroo Valley and Yalwal and Coolendel
- ⚠️ Known for fast river rise, limited warning downstream in Nowra
📍Comparable to Guadalupe River’s upper forks and hill terrain
b. Macquarie River & Fish River, NSW (Bathurst – Hill End – Wellington)
- 🏞️ Steep gorges (Macquarie Pass, Fish River Gorge)
- 🛶 Popular for camping/fishing
- ⚠️ Flash floods possible when tributaries rise in isolation, especially above Bathurst
📍Similar to mid-river zone of Guadalupe, with junction dynamics
3. Barrington River & Gloucester River, NSW
- 🏞️ Very steep terrain in Barrington Tops NP
- 🌲 Fast-flowing rivers with confluences near Gloucester
- ⛺ Multiple riverside cabins + farm-stay tourism operators
📍Similar to Camp Mystic zone — remote riverside accommodation downstream of gorges
c. Ovens and Buckland Rivers, VIC (Bright – Porepunkah – Harrietville)
- 🏞️ Steep alpine catchments in the Victorian Alps
- ⚠️ Rapid storm runoff → flooding in Bright and along Ovens River
- 🏕️ Many holiday parks, riverside walks, and schools camps
📍Similar to Guadalupe tributaries near summer camps
d. Broken River, VIC (Delatite – Mansfield region)
- 🏞️ Steep terrain, narrow valleys near Lake Nillahcootie
- 🛶 Popular for outdoor education camps and kayaking
- ⚠️ Confluence zones prone to rapid flooding
e. Fitzroy River, QLD (Carnarvon Gorge – Rockhampton)
- 🏞️ Steep gorges upstream in Carnarvon NP
- ⛺ Tourists and bushwalkers often unaware of rainfall upstream
- ⚠️ Flash floods possible from upstream rain not visible locally
📍Risk: Sudden river rise in dry weather = dangerous camping
f. Bellingen & Never Never Rivers, NSW
- 🏞️ Tributaries from Dorrigo Plateau → steep descent into gorges
- ⛺ Prominent riverside campsites and swimming holes (e.g. Promised Land)
- ⚠️ Fast runoff and poor phone reception = dangerous flash flood profile
🔍 Summary of risk factors:
| Feature | Risk Factor |
|---|---|
| Creek confluences | Multiplying discharge rapidly |
| Narrow gorges | Sudden rise and surge effect |
| Steep terrain | Fast runoff, no absorption |
| Upstream national parks | Rainfall may be unseen downstream |
| Downstream tourism | Campsites, cabins, low situational awareness |
⚠️ 📢 2. Warning Systems Must Be Universal, Not Opt-In
In Texas:
Local authorities relied on an opt-in app (CodeRED) and failed to activate the national IPAWS system — many campers and residents got no warning at all.
In Australia:
- We rely on text alerts, RFS apps, and media, but there is fragmentation between states and LGAs.
- Not everyone uses apps like Hazards Near Me or VicEmergency.
➡️ Australia must ensure that:
- Emergency alerts are mandated at the national level
- Redundancy exists across SMS, radio, TV, apps, and satellite messaging
- Geo-targeted alerts are tested and mandatory for local councils
🏕️ 🎯 3. Holiday Period Risk Must Be Actively Managed
In Texas:
The flood hit during the Fourth of July holiday — campsites, cabins, riverside properties were full of people unaware of the danger.
In Australia:
- Bushfires, storms, and floods peak in holiday season (Dec–Feb)
- Coastal and inland camping hotspots (e.g. Shoalhaven, Snowy Valleys, Otways) are highly exposed
➡️ Australia needs:
- Proactive seasonal risk bulletins
- Localised hazard dashboards for visitors
- Integration of hazard alerts into tourism platforms, Airbnb, and campground booking systems
🛰️📡 4. Geospatial Risk Mapping Must Be Open and Usable
Texas had fire and flood data — but the visualisation and communication of risk was lacking. Maps were not integrated into decision-making in real time.
Australia has:
- Good geospatial hazard data (NSW SEED, QRA Flood Viewer, VicGov’s Fire History layers)
- But still lacks real-time, citizen-facing GIS tools for:
- Address-based risk summaries
- Evacuation zone overlays
- Live rainfall + river telemetry in one place
➡️ There’s a major opportunity for:
- Public-facing risk dashboards using AI + GIS
- Interactive evacuation planning tools per LGA
- Open-source address-level hazard reporting tools (especially for rural councils)
🌡️🌪️ 5. Climate Amplification Is Here Now
The Texas flood was supercharged by:
- Warm Gulf air → extreme moisture
- Drought-hardened soil → more runoff
- Increased storm persistence due to atmospheric blocking
Australia faces the same pattern:
- La Niña years = east coast flood clusters
- Hotter atmosphere = heavier rainfall per storm
- Drought → Fire → Storms → Floods (in a destructive cascade)
➡️ Every hazard planning document and infrastructure design code must now include climate-amplified scenarios.
That means:
- Shorter return periods for “1-in-100-year” events
- More flexible evacuation planning
- Dynamic, scenario-based emergency simulations
🧠 Final Takeaways
| Texas Lesson | Australian Response |
|---|---|
| Opt-in warning failed | Mandate cross-platform alerts |
| Terrain amplified floods | Update flood models for steep catchments |
| Holiday timing worsened impact | Integrate hazard comms into tourism systems |
| GIS underused | Build citizen-ready hazard dashboards |
| Climate intensified rainfall | Plan for compound, not isolated, events |
Northstream Analytic 