A CITY THAT HAS ALWAYS KNOWN THE RISK.

There is a kind of knowledge that becomes structural — embedded not just in the minds of residents but in the very buildings they inhabit, the drains they maintain, the emergency plans they rehearse with a matter-of-factness that might unsettle those who have never lived in the tropics. Cairns carries that knowledge in its bones. To live in this city on the Coral Sea, set between the ranges and the reef, is to accept, consciously or otherwise, that the atmospheric system which makes Far North Queensland one of the most ecologically extraordinary places on earth is also one of its most punishing forces. Cyclones are not occasional catastrophes in Cairns. They are a recurring condition — a structural feature of the landscape as much as the mountains to the west or the mangroves at the waterline.

Since Cairns was founded in 1876, there have been at least 53 cyclones which have had a reported or measured impact on the city. That figure, drawn from records held by the State Library of Queensland, covers nearly a century and a half of civic life. It means that roughly once every three years, on average, a tropical system has made its presence felt in ways that range from the merely disruptive to the genuinely devastating. Cairns comes under the influence of tropical cyclones on average at least once every two years. The city was barely two years old when the first recorded cyclone nearly finished it. One of the first, on 8 March 1878, almost destroyed the settlement before it had a chance to fully establish. That the settlement persisted is itself a statement of intent — civic, economic, and cultural — about what kind of place the European settlers intended to build, and what the Gimuy Walubara Yidinji people who had lived on this country for millennia already understood about surviving in the tropics.

This is not history as backdrop. It is history as instruction. Every cyclone season, from November through to April, the same atmospheric dynamics reassert themselves over the Coral Sea and the Gulf of Carpentaria, and the city of roughly 150,000 people that now stands where that colonial settlement once gathered its timbers prepares itself accordingly. The question that presses with increasing urgency — and which this essay takes as its subject — is what it means to continue building, growing, and governing a city in a zone whose hazard profile is not diminishing but intensifying.

THE ARCHIVE OF DESTRUCTION.

The cyclone record for Far North Queensland reads, in places, like a ledger of civic trauma. Since 1858, there have been 207 tropical cyclones along the east coast of Queensland, with the majority hitting North Queensland. Within that long catalogue, the storms that struck closest to Cairns or transformed its surrounding communities are woven into the city’s institutional memory in ways that other kinds of disaster rarely are.

The Willis Cyclone of 1927 caused widespread destruction to the region and devastated Chinatown — an event that erased much of a cultural precinct that had taken decades to establish, displacing a community and altering the social geography of the city in ways that persisted for generations. Tropical Cyclone Agnes, the first tropical cyclone officially recorded in Far North Queensland, crossed the coast near Cairns in 1956. When Cyclone Agnes crossed the coast near Cairns, it caused widespread damage to homes, businesses and crops. The damage cost the city 2.5 million pounds, the equivalent of roughly $75 million today. For a young and growing regional city, it was a defining moment and one that would influence how Cairns prepared for severe weather in the decades to come.

Cyclone Winifred, a Category 3 system in 1986, caused extensive crop and structural damage across the region. Throughout Queensland, the cyclone isolated small towns, cut off telephone service, inflicted severe damage to crops, and generated widespread flooding. Between Cairns and Ingham, Winifred obliterated structures, toppled power lines, uprooted trees, and wrecked 1,000 homes. Then came the storms that, for many Australians south of the Tropic of Capricorn, first brought the reality of Far North Queensland’s cyclone exposure into national consciousness.

The eye of Cyclone Larry crossed the coast in between Gordonvale and Tully between 6:20 am and 7:20 am AEST on 20 March 2006. Larry was a Category 5 system, and throughout Queensland, Cyclone Larry resulted in roughly AU$1.5 billion in damage. At the time, this made Larry the costliest tropical cyclone to ever impact Australia, surpassing Cyclone Tracy in 1974. Larry devastated Innisfail and affected the wider Far North with an estimated 10,000 houses damaged. Cairns, the largest city in the region affected by the cyclone, sustained minor structural damage, mostly comprising fallen power lines and houses damaged by fallen trees throughout the city. The relative sparing of Cairns was an accident of trajectory, not evidence of safety.

Five years later, Cyclone Yasi surpassed even Larry. At about midnight on 3 February 2011, Yasi crossed the Australian coastline as a Category 5 severe tropical cyclone near Mission Beach, with estimated maximum 3-second gusts of 285 km/h spanning an area from Ingham to Cairns. A record low pressure of 929 hPa was measured as the eye passed over Tully. Thirty thousand people were evacuated from Cairns, including all patients from Cairns Base Hospital and Cairns Private Hospital, who were airlifted by the Royal Australian Air Force and other agencies to Brisbane. The storm caused an estimated AU$3.5 billion in damage, making it the costliest tropical cyclone to hit Australia on record. The storm passed between the two big cities of Cairns and Townsville, which only suffered minor damage. Once again, Cairns was spared by geography, by the storm’s track passing to the south.

Most recently, Cyclone Jasper, a Category 2 system in December 2023, brought record-breaking rainfall and significant widespread flooding to the region. Jasper produced five-day rainfall totals of 2,166 mm at Black Mountain and 2,025 mm at Myola, both near the town of Kuranda, making Jasper the wettest tropical cyclone in Australia on record. The Barron River surpassed the March 1977 record of 3.8 metres, making the event the worst flooding since records began in 1915. The destruction was not primarily from wind. It was from water — a distinction that has become central to how researchers and planners now think about cyclone risk in the twenty-first century.

THE GEOGRAPHY OF VULNERABILITY.

To understand why Cairns occupies such a particular position in Australia’s tropical hazard landscape, it is necessary to think about geography — not just as backdrop, but as a determining factor in the city’s relationship with atmospheric violence. The Coral Sea coast on which Cairns sits is shallow and curved, which amplifies storm surge when a system crosses at the right angle. The mountains of the Great Dividing Range rise abruptly to the west, compressing and intensifying rainfall systems that track inland. Between the mountains and the sea, a narrow coastal plain holds the city’s suburbs, its airport, its agriculture, and its infrastructure. There is very little physical room to escape the convergence of hazards.

Cairns flooding is a major issue for many people living in this tropical city in Far North Queensland. The city is low-lying and subject to inundation. Storm surges during tropical cyclones can create emergency situations where lives are at risk. During a storm surge, large volumes of seawater push into the city. If this coincides with heavy rain, which sends freshwater flowing down from the hills, low-lying Cairns residents experience a double whammy of inundation. This compound hazard — the simultaneous arrival of seawater from the coast and freshwater from the ranges — is not theoretical. It is a documented characteristic of the way extreme weather behaves in this landscape, and it was visible in the Jasper floods of 2023 in sharp and damaging form.

Properties in the Barron River delta area are especially vulnerable, along with much of central Cairns. The suburbs of Parramatta Park, Westcourt and Manunda are also highly vulnerable to sea-level rise and flooding. The distribution of vulnerability across the urban fabric is not random. It reflects patterns of historical settlement, of decisions made decades ago about where to build and what to build, and of the degree to which planning systems accounted for a hazard that was always present but not always taken seriously enough in its cumulative severity.

Since 1858, there have been 207 tropical cyclones along the east coast of Queensland with the majority hitting North Queensland. There is a strong relationship with Eastern Australian tropical cyclone impacts and the El Niño-Southern Oscillation phenomenon, with almost twice as many impacts during La Niña than during El Niño. The implications of this ENSO-driven variability are significant for long-range planning. The years of greatest exposure are predictable in pattern even when specific events are not, and planning systems that fail to account for this cyclical intensification leave communities more vulnerable than they need to be.

BUILDING CODES AND THE ARCHITECTURE OF SURVIVAL.

One of the most consequential decisions in the governance of northern Australian cities was the tightening of cyclone building standards in the mid-1980s. That was the year — 1985 — that building regulations changed to require new houses in cyclone-prone areas to be able to withstand higher winds. The practical effect of this regulatory shift has been demonstrated repeatedly since. During Cyclone Yasi, for example, 12 per cent of older homes suffered severe roof damage, but only 3 per cent of newer homes. The gap in performance between pre- and post-1985 construction is not marginal. It is the difference, in a severe event, between a neighbourhood that recovers in weeks and one that requires years of rebuilding.

In general terms, homes built before 1985 usually sustain more damage during a cyclone than more recently built homes. Post-code homes have generally performed well in recent events such as Severe Tropical Cyclone Larry in 2006, Severe Tropical Cyclone Yasi in 2011, and Severe Tropical Cyclone Debbie in 2017. Buildings constructed prior to the introduction of higher cyclone rating standards suffered comparatively more damage.

If a home was built after the mid-1980s, when building codes changed to make buildings more cyclone resilient, the best and most comfortable option during a cyclone is to shelter in place. This is a striking piece of public guidance — one that encodes, in its practical plainness, decades of hard-won understanding about what kinds of structures can and cannot withstand tropical violence. It also implies its troubling corollary: that a substantial proportion of Cairns’s housing stock, built in earlier decades, does not meet that threshold, and that those residents face a materially different risk profile during a severe event.

The Queensland Reconstruction Authority and Cairns Regional Council have produced guidance on cyclone resilient building that the Get Ready Queensland program distributes throughout the region. However, the varying size and intensity of cyclones means that it is not possible to guarantee a home is completely cyclone-proof. It is likely that during a severe tropical cyclone most homes will suffer at least some minor damage, such as lost gutters, damaged awnings and aerials, and some water inundation. The acknowledgement that even the best-built homes will suffer some damage is not defeatism — it is honest risk communication, the kind that experienced emergency managers have learned is more useful than reassurance.

WHAT CLIMATE CHANGE ADDS TO AN ALREADY HAZARDOUS PICTURE.

The hazard that Cairns has navigated for nearly 150 years is not static. Climate change is altering both the character of tropical cyclones and the conditions into which they arrive. The emerging scientific picture is one of compound pressure: fewer cyclones in some modelling scenarios, but more intense ones, crossing a coastline where sea levels are higher and the atmosphere holds more moisture. Each of these changes amplifies the consequences of a direct hit.

With rising sea levels and a projected increase in cyclone intensity, there is likely to be an increased risk of coastal flooding, especially in low-lying areas exposed to cyclones and storm surges. For example, the area of Cairns’s risk of flooding by a 1-in-100-year storm surge is likely to more than double by the middle of this century. That figure — a doubling of the flood risk footprint within the span of a generation — is not buried in a technical appendix. It comes from CSIRO research and it should carry the weight of a planning directive. The geography that already makes Cairns vulnerable becomes, under these projections, significantly more so.

Emergency planning must take the effects of climate change more seriously. This includes increases in sea level, and more intense tropical cyclones, storm surges, rainfall and flooding. This is not speculative language from fringe researchers. It is the considered view of climate scientists writing for The Conversation, Australia’s most read academic commentary platform, in the immediate aftermath of the Jasper floods — floods which, as they noted, exposed the degree to which earlier developments had been approved without full consideration of future flood conditions.

In many cases, earlier developments were approved without full consideration of future floods. Many were also approved before local government planning started taking sea level rise into consideration. This is the planning legacy that the current generation of decision-makers in Cairns inherits: a built environment that was shaped by risk assumptions that climate science has now revised upward, in some cases substantially. Addressing that legacy, while simultaneously managing growth and providing the services a regional city requires, is among the most complex governance challenges Cairns faces.

Extreme rainfall from tropical cyclones is also likely to increase. The Jasper event illustrated this with brutal clarity. A Category 2 system — one that would once have been considered moderate in intensity — became the wettest tropical cyclone ever recorded in Australia. The ex-cyclone stalled just inland from the southeast Gulf of Carpentaria, creating what researchers call a “stationary convergence zone” for torrential rain. Incredibly moist tropical winds collided over a narrow zone between Port Douglas and Innisfail. This has led to a greater risk of extreme rainfall and flooding. For every 1°C rise in average global temperature, the atmosphere can hold an extra 7 per cent water vapour. When the right atmospheric triggers are in place, this extra water vapour is released as intense rainfall.

The lesson of Jasper is that the category number assigned to a cyclone at landfall no longer tells the full story of what a storm can do. The water it carries, the manner in which it stalls or accelerates, the sea level into which its surge pushes — these are the variables that will increasingly determine whether a city like Cairns weathers a storm or is defined by it.

CIVIC PREPAREDNESS AS INSTITUTIONAL CHARACTER.

What distinguishes Cairns from many cities living with chronic hazard is the degree to which preparedness has become a dimension of civic identity rather than merely an emergency management function. As the Cairns Regional Council has acknowledged, living in the tropics has shaped who the community is. The community has faced powerful storms, rebuilt stronger each time, and developed a deep respect for the environment it lives in.

The Council has translated its Preparing for Cyclones guide into languages commonly spoken in the region and has produced two films in Auslan to assist people with hearing impairment to be best prepared for cyclones and storm surge flooding. This multilingual, multimodal approach to emergency communication reflects the social complexity of a city that draws its population from across Australia and the world — a gateway city whose permanent residents include communities whose first language is not English and whose familiarity with tropical cyclone risk may have been formed in very different geographical and institutional contexts.

In Cairns, evacuation advice is only issued for storm surge, not the strong winds and rain associated with a cyclone. Residents who do not live in storm surge areas may not be admitted to public storm tide cyclone shelters. The granularity of this policy — distinguishing between storm surge evacuation zones and wind-and-rain exposure — reflects a sophisticated operational understanding of how different parts of the city face different components of the same storm. It also reflects the investment that has been made, over decades of successive events, in understanding the city’s topography at a level of detail that makes differentiated response possible.

Coastal hazard maps covering sea level rise, storm tide inundation, and erosion have been developed for the City of Cairns, used to undertake a risk assessment of assets and infrastructure under three timeframes — current, 2050, and 2100 — incorporating climate change projections. In line with the Queensland Coastal Hazard Adaptation Strategy program, the project assessed climate change risks of 1,034 kilometres of sealed roads, other linear infrastructure including water supply, sewer and drainage, and a broad range of commercial, public and private assets in the City. The scale of this assessment — 1,034 kilometres of roads, across three time horizons — gives some sense of the institutional investment Cairns has made in understanding its own vulnerability. That investment does not neutralise the risk. But it does represent the kind of governance response that makes informed, long-range planning possible.

THE QUESTION OF GROWTH IN A HIGH-HAZARD CITY.

Cairns continues to grow. Its population has expanded significantly over recent decades, and pressures on housing, services, and infrastructure are constant themes in local civic life — a subject addressed more fully in the companion article on Cairns’s infrastructure deficit. But growth in a high-hazard environment carries a particular civic obligation: to ensure that new development does not simply extend the footprint of vulnerability.

The Cairns region is a beautiful, tropical area that faces vulnerability to natural disasters. With mountains to the west and large catchments supporting rivers, creeks, and low-lying coastal areas, many residents are likely to experience flooding in their lifetime. The question of where new development is permitted — which low-lying areas are opened to subdivision, which floodplain margins are approved for residential construction, which infrastructure investments are made to protect existing communities — is not merely technical. It is a question about what obligations a civic authority owes to future residents who will live with decisions made today.

Due to its high annual rainfall, climate change, and housing developments in low-lying areas, flooding is a significant issue in Cairns. The intersection of climate-driven intensification and planning-driven exposure is precisely the combination that makes a city’s hazard profile grow faster than any individual variable would predict. A city that builds in floodplains while its rainfall intensifies is compounding risk at both ends. The governance challenge is to resist the pressures — economic, demographic, political — that push development into zones where the cost will eventually be paid not in development levies but in evacuation orders and insurance losses and lives disrupted.

As Cairns Regional Council has observed: cyclones are unpredictable, but the key actions that can be taken to minimise damage and speed up recovery are known. The city has lived experiences of severe weather events that have led to stronger building standards, improved emergency management systems and better forecasting. The arc of improvement is real. The building codes are stronger. The forecasting systems are more sophisticated. The emergency management frameworks are better coordinated. But the arc of climate change is also real, and it bends in the other direction.

PERMANENCE, RISK, AND THE CIVIC RECORD.

There is something worth pausing on in the fact that Cairns has, despite everything, persisted. A settlement nearly destroyed in its second year of existence. A city visited by more than fifty cyclones across its 150-year history. A community that has rebuilt Chinatown, repaired its roads, replanted its cane and banana farms, restored its power networks, reopened its hospitals, and done so repeatedly, across generations, across the full catalogue of tropical severity. That persistence is a civic achievement. It should be documented, and it should be legible to those who come after.

This is part of what it means to anchor civic identity in durable infrastructure. The recorded histories of how Cairns has responded to cyclone threat — the building code revisions, the evacuation plans, the flood mapping, the emergency communication networks, the community languages in which preparedness is taught — constitute a form of institutional knowledge that should be preserved and made searchable in ways that outlast any individual government term or planning cycle. The Queensland Foundation’s onchain namespace project, of which cairns.queensland is the permanent civic address for this city and its layered record, is one expression of that ambition: the idea that what a place knows about itself, and about what it has survived, should be held in a form as permanent as the risks the place faces.

The climate science that now shapes the way Cairns must think about its future is neither new nor surprising in its broad contours. What changes is the specificity, the confidence, and the urgency. CSIRO projections pointing to a doubling of the city’s storm surge flood risk footprint within a generation are not alarming in an abstract way — they are alarming in a planning-and-governance way, which is the mode in which a serious civic administration should receive them. The question is not whether the risk is real. The question is whether the institutional response matches the scale of what the science is describing.

Cairns has earned, through long experience, a particular kind of competence in the face of tropical hazard. The community has rebuilt stronger each time, and developed a deep respect for the environment it lives in. It is important to acknowledge not just milestones and achievements, but the challenges that have made the community more resilient. That acknowledgement — of vulnerability as part of identity, of challenge as constitutive of character — is itself a civic resource. A city that understands what it has survived is better placed to prepare for what is coming than one that treats each event as an anomaly.

The permanent civic record that cairns.queensland represents is, in that sense, not merely archival. It is operational. A city that can locate its own history of hazard — its building codes, its flood maps, its emergency plans, its cultural knowledge of what severe weather looks like and how it must be met — is a city that governs its tropical risk with the tools that risk demands. The archive and the forecast belong together. In a city built at the edge of the cyclone belt, they always have.