From wartime trenches and anti-tank gates to Cold War fears and tsunami warnings, an old siren on a roadside pole led me on a history hunt through Timaru's streets, newspapers and Council records. I was travelling along Grey Road when I happened to look up... there, near the corner of North Street, was an old Civil Defence siren mounted high on a pole.
I must have passed it hundreds of times without really noticing. How long had it been there? Who decided to put it on that particular corner? What was happening in Timaru, New Zealand and the wider world when somebody decided our neighbourhood needed to hear an emergency warning? And could it have been there during the Second World War?
I went looking. What I thought would be a simple question about an old piece of machinery took me through wartime preparations, air raid shelters, local memories, the Cold War and the development of Timaru's modern warning systems.
Along the way, I realised just how many reminders of our history are still scattered around our small city, often in places we pass without a second glance.
FIRST CLUE: NUMBER THREE ON THE LIST
My first useful discovery was in Timaru District Council's Environmental Services Committee agenda of 8 June 2021.
An independent review of the district's warning system included a detailed inventory of sirens.
The first three entries were particularly interesting.
Siren 1 – King Street and Royal Street: Mechanical siren.
Siren 2 – North Street and Turnbull Street: Electronic siren.
Siren 3 – North Street and Grey Road: Mechanical siren.
There it was. Number three.
According to the review, the Grey Road siren stood at a location more than 16 metres above sea level, outside the identified high-risk tsunami area. The recommendation was to decommission it. The numbers were simply inventory references, not installation dates. The report told me where the siren was and what type of equipment it used, but not how old it was. I wondered whether it could be a remnant of Timaru's wartime air raid precautions. That sent me back to the early 1940s.
WHEN INVASION FELT WORRYINGLY CLOSE
New Zealand entered the Second World War in September 1939. At first, the fighting was largely taking place far from our shores.
But that changed when Japan attacked Pearl Harbour on 7 December 1941, war in the Pacific suddenly felt much closer. The fall of Singapore in February 1942 brought further concern.
People in Timaru had no way of knowing how events would unfold. They were making decisions based on what they knew and feared at the time.
And those decisions began changing the town... beaches became possible invasion routes. Roads, bridges and railway lines became places that might need defending. Schools prepared emergency trenches, while civilians learnt what to do if an alarm sounded.
It is difficult to imagine today, when Caroline Bay is somewhere we go for a walk, a swim or a picnic. But during the war, people were looking at that same coastline and considering how an enemy might approach it.
THE HOME GUARD: ORDINARY MEN PREPARING FOR EXTRAORDINARY CIRCUMSTANCES
One local account I would particularly like to confirm concerns Home Guard members camping in tents at the Washdyke racecourse, now known as Phar Lap Raceway. The recollection describes men remaining at the camp overnight, ready to respond to an emergency, before returning to their ordinary jobs during the day. I haven't yet located a contemporary document verifying those specific arrangements, but the wider history of the Timaru Home Guard is well recorded.
South Canterbury Museum holds a photograph of the Combined Washdyke and Timaru Home Guard taken at Ashbury Park in 1942, along with a Timaru Battalion roll book covering 1940–45. These were local men preparing to defend their own community. Some were older, others had occupations considered essential, and many had families and responsibilities outside their military training.
I find the personal side of this remarkable. A man might spend his working day at a local business or on a farm, then take part in drills and exercises intended to prepare him for an invasion. The museum's Home Guard records may eventually tell us more about the racecourse camp, its dates and the men who were there.
BLACKOUTS: MAKING TIMARU DISAPPEAR AFTER DARK
Another part of the preparations involved the town's lighting. Blackout restrictions were intended to make settlements, ports and important facilities less visible to enemy aircraft. Throughout New Zealand, households were required to prevent light from escaping through windows. Outdoor lighting was restricted, and communities practised the procedures. Timaru had discussions and trials concerning blackout arrangements.
Imagine the difference to daily life. Coming home after dark, making sure curtains were properly drawn, restricting outdoor lighting and learning to move around familiar places under unfamiliar conditions.
There were practical inconveniences, but behind the rules was a serious purpose. People were trying to make their town less vulnerable. These are the things I find interesting when researching local history. A decision made thousands of kilometres away could eventually influence something as ordinary as how a family covered its windows in Timaru.
SHELTERS WERE BEING CONSTRUCTED IN TIMARU'S CLIFFS
According to Timaru District Council's heritage assessment of the surviving Station Street air raid shelter, the town was already constructing public shelters by December 1941. The assessment draws on contemporary newspaper reports, including the Timaru Herald of 20 December 1941.
Shelters had been established in Station Street, Perth Street, at both ends of Caroline Bay and at other locations around Timaru. At least 34 appear to have been built, including some at schools. I was interested to learn about the surviving shelter near the railway station. The approximately 18-metre tunnel was excavated into the clay bank, with three entrances leading into it.
The structure is associated with Robert J. Comrie, who became Timaru Borough Engineer in January 1940. Its position near the railway and port was significant. Both were important to the town's transport, trade and employment. By March 1944, the threat of invasion had diminished, and Council resolved to seal the shelter.
Many other shelters were filled in. This one survived. Today, the Station Street structure is recognised as a Category A heritage item in Timaru's district planning records. It is an extraordinary reminder of a time when local authorities were constructing places for civilians to take refuge from possible enemy attack.
SIDE QUEST: LOOK UP AT THE VIRTUE AVENUE VIADUCT
This is one of my favourite examples of history hiding in plain sight.If you travel down Virtue Avenue towards Caroline Bay and look up beneath the railway viaduct, you can still see substantial old iron fittings. In local heritage research, these have been identified as hinges associated with wartime anti-tank gates.
I went to look for them after hearing about their history. And there they were... I had passed beneath the bridge so many times without knowing what I was looking at.
During the war, defensive obstacles were prepared around Caroline Bay. Large concrete cylinders were placed near access routes so that roads could be obstructed if necessary. The viaduct fittings are another surviving reminder of the measures taken to control access from the coast. The exact installation record for the gates has not yet been located, so their engineering history deserves further investigation.
But the physical remains give us a starting point. Imagine that familiar road being part of a system intended to prevent enemy vehicles moving inland.
What we now see as a route to the beach was once considered part of a possible defensive line.
GUNS OVERLOOKING THE SEA AT SMITHFIELD
Another part of Timaru's wartime preparations can be found further north along the coast.
According to Heritage New Zealand Pouhere Taonga, the Timaru Coast Defence Battery was constructed at Smithfield in 1942. Two gun emplacements and an observation post formed part of the installation, intended to help defend the port against possible attack from the sea. The work involved military personnel, government agencies, engineers and contractors.
The concrete structures are evidence that the possibility of invasion was taken seriously. Some of the remains survive today, and the battery is recognised as a Category 2 historic place. The site is on private property, so access requires permission.
It is another example of Timaru's landscape being altered because people were preparing for something they hoped would never happen.
A LITTLE GIRL, A LINEN POUCH AND AN AIR RAID TRENCH
One of the most memorable conversations I've had about wartime Timaru was with an older woman who remembered attending Timaru Main School. She told me about the regular air raid practices. When the siren sounded, the children went into trenches dug in the school grounds. She remembered having a small linen pouch hanging around her neck.
Inside were chewing gum and a cork. She recalled being instructed to use the chewing gum in her ears and hold the cork between her teeth. I asked whether she had been frightened. She said no. She didn't really think much about it. She simply did what she was told. I have thought about that conversation often. Imagine being a child and treating preparations for a possible air raid as another part of the school day. Her recollection is oral history, rather than independent proof of the precise procedures. I would love to find a school notice or contemporary account confirming those instructions.
But it captures something that official records sometimes struggle to convey: how extraordinary events can become part of ordinary life.
And there is another connection to the Grey Road siren. Timaru Main School stood in the Grey Road and Arthur Street area. The present mechanical siren is nearby. That doesn't mean it is the siren she heard during wartime drills. We have no evidence establishing such a connection. But it does mean that the siren and her memories belong to the history of the same neighbourhood.
WHAT DID THE NEWSPAPERS SAY ABOUT WARTIME SIRENS?
While searching historical newspaper references, two Timaru Herald headlines from April 1943 emerged as interesting leads.
The first, dated 8 April, was headed: “TEMUKA ALARM SIRENS WANTED”
The second, dated 24 April, was: “GERALDINE SIRENS WAKE BABIES”
I haven't yet verified their complete article texts, so I don't want to make assumptions about the circumstances or decisions they described.
But they are worth following... who supplied the sirens? Where were they installed? How often did they sound? Were people reassured by them, irritated by them, or both? These are exactly the sorts of details that can give us a better understanding of everyday life during wartime.
A SURPRISE: TIMARU'S MECHANICAL SIRENS MAY DATE FROM THE 1950S
I returned to the original question: just how old is the Grey Road machine? In December 2013, researchers Brendan Morris and Graham Leonard published a national study examining warning sirens in New Zealand.
On page 21, they recorded that Timaru's original mechanical Civil Defence sirens were installed around the 1960s, with newer mechanical machines added around the 1980s.
Electronic sirens began arriving from 2007–08. I thought that might be as close as we could get to a date.
Then I found another clue in Timaru District Council's own records, where its 2015 Civil Defence Plan, written by emergency management adviser Lamorna Cooper, includes an asset table on page 52.
The table describes sirens around Timaru's CBD and township as dating from circa the 1950s. The national research suggests the 1960s, while Council's asset summary refers to the 1950s. Neither source identifies the Grey Road machine individually, and the approximate dates may reflect different records or generations of equipment. But the discovery suggests that some of Timaru's post-war warning infrastructure may be older than I originally thought.
To identify the Grey Road machine properly, we need more than an approximate date for the district's network. We need to know when the pole was erected, when a siren was first fitted to it, and whether the machine was ever replaced. The pole and the siren may have different histories.
FROM THE SECOND WORLD WAR TO THE COLD WAR
Following the war, the world entered another period of uncertainty. The United States and the Soviet Union became rival nuclear powers. Governments began thinking about how civilian populations could be protected or warned if nuclear conflict occurred. New Zealand established a Ministry of Civil Defence in 1959, followed by the Civil Defence Act in 1962.
Timaru's post-war warning network developed during this period. Council's 2021 report suggests that the original mechanical sirens may have been associated with fears of nuclear attack. Importantly, it describes that explanation as anecdotal. We therefore cannot say that the Grey Road siren was installed specifically because of the Cold War.
Nevertheless, it provides an interesting historical context for the era in which Timaru was developing its mechanical warning network. The threats people prepared for were changing.
And before long, natural hazards would become an increasingly important part of Civil Defence planning.
ANOTHER UNEXPECTED DISCOVERY: THOUSANDS GATHERED ABOVE CAROLINE BAY IN 1960
While following the history of Civil Defence in the 1960s, I came across an extraordinary local story.
In May 1960, a devastating earthquake struck Chile, generating a tsunami that travelled across the Pacific. New Zealand communities were affected, and a further tsunami warning later that month caused considerable public concern.
Researchers examining the country's response documented what happened in Timaru on 26 May 1960. Drawing on a New Zealand Herald report published the following day, they recorded thousands of people gathering along the cliffs above Caroline Bay for nearly two hours. Much of the town's normal business and industrial activity stopped.
Imagine that scene... people travelling to the cliffs and looking out over the same coastline that, less than twenty years earlier, had been the focus of wartime defence preparations. The story is a reminder that even while governments were considering the threat of nuclear conflict, communities also faced danger from natural events. It also shows how much our understanding of emergency warnings has changed. Today, people are advised to move away from tsunami danger areas rather than gather to watch the sea.
THE PROBLEM WITH TIMARU'S MECHANICAL SIRENS
The old sirens were ingenious machines. An electric motor turned a rotor that interrupted the flow of air, producing the powerful wailing sound associated with emergency warnings. But there was a problem. Timaru's coastal environment was hard on them. According to Lamorna Cooper's 2015 Civil Defence Plan, mechanical sirens could seize because of salt corrosion between tests.
Council had previously tested them quarterly, but the machinery often required maintenance by the time the next test came around. The testing schedule was therefore changed to monthly.
The plan also records that Alpine Energy provided access to utility poles and power supplies for the warning network. This was another part of the story I hadn't considered when I first looked up at the Grey Road pole. The siren was more than a machine making noise. It needed power, mounting equipment, controls, inspections and maintenance.
There were people responsible for keeping it working. And while Council's documents tell us about the system, they don't yet tell us who installed or maintained that particular Grey Road unit.
WHY DID COUNCIL WANT TO REMOVE THE GREY ROAD SIREN?
By 2021, Timaru was reviewing its warning network against modern standards. An independent assessment by Steve McDowell of Ignition Group helped inform Council's proposals. The old mechanical machines were no longer considered suitable in every location. Electronic sirens offered greater flexibility, including systems capable of broadcasting spoken instructions. The Grey Road location was identified as being outside the high-risk tsunami area assessed in the review, and its older mechanical equipment was recommended for decommissioning. The recommendation was not necessarily a judgement about the machine's historical significance. It was an assessment of its usefulness and compliance as emergency infrastructure.
That distinction is important., because by October 2024, the Grey Road machine was still recorded as Siren 03, situated on Council road reserve and classified as Priority 2 for decommissioning.
It was one of 19 non-compliant sirens Council reported as still connected to power supplies across the district. The report also explained that removing older equipment involved costs, electrical disconnection and safety considerations. And there was another interesting detail.
TWO OLD SIRENS, AND THE POSSIBILITY OF A MUSEUM
Council's October 2024 report recorded that two previously decommissioned sirens were in temporary storage with a local electrical company.
Two outside parties had also expressed interest in obtaining old mechanical sirens for museum displays. Somebody else had recognised that these machines might be worth preserving as part of our history. The report did not identify the stored machines, their previous locations or the people interested in them. I haven't established whether any were eventually transferred to a museum.
But the possibility is worth exploring. A preserved mechanical siren could tell the story of the people who installed and maintained Timaru's warning systems, the technology they used and how ideas about public safety changed. It could sit alongside photographs of wartime shelters, Home Guard exercises and later Civil Defence activities. Not as a machine we still depend upon, but as an object that helps us understand our past.
IS A SIREN ON A POLE REALLY BUILT HERITAGE?
We often think of heritage as an old building, a church, a bridge or a monument. But our towns are also made up of practical things that previous generations built because they identified a problem that needed solving.
Water reservoirs. Railway signals. Drainage systems. Streetlights. Electricity poles. Emergency sirens.
They may not have been designed to be beautiful, but they tell us something about the way a community worked. The Grey Road siren is a good example. At some point, somebody selected that corner. Someone arranged for equipment to be installed, powered and maintained.
Later, somebody decided newer technology could provide a better warning system. Those decisions were made by people responding to the needs of their time. The physical objects are evidence of those choices.
Not every outdated piece of infrastructure needs to remain standing. There are costs, safety requirements and practical reasons to replace it. But recording its history before removal is another matter. Perhaps we should photograph the remaining mechanical sirens, identify their models, collect their installation dates and preserve a representative example. That way, the history can survive even when the equipment no longer has a useful purpose.
THE HISTORY WE DON'T ALWAYS NOTICE
What began as a question about a siren turned into a journey through the things earlier generations of Timaru residents were preparing for. During the Second World War, people constructed shelters and coastal defences because they feared invasion. The Home Guard practised responding to emergencies. Households observed blackout restrictions. Children rehearsed what to do if a siren sounded.
During the Cold War, new warning systems developed. As understanding of earthquakes, flooding and tsunami improved, the way communities prepared changed again.
Today we have modern sirens, emergency mobile alerts, radio communications, evacuation planning and better scientific information. The systems will keep changing.
And every generation will have to decide which problems matter most and how to prepare for them. That is why I think understanding our built heritage is useful. The things previous generations built tell us what they were worried about, what they valued and what they were prepared to invest in. Knowing that history doesn't tell us exactly what to do next. But it gives us a better understanding of the choices that brought us here.
And perhaps that helps us make more thoughtful decisions about the future. Sometimes the most interesting stories are not in the grand buildings or monuments. They are tucked into the cliff beside a street, attached to a railway viaduct, buried beneath a park, or mounted high on a pole above the traffic.
I still don't know exactly when the Grey Road siren was installed, but I think it could be the one that is there today. But I know much more about the town that once needed machines like it. And I wonder how many other pieces of Timaru's history we pass each day without looking up.
CAN YOU HELP SOLVE THE GREY ROAD SIREN MYSTERY?
I would love to hear from anyone who remembers the mechanical siren near North Street and Grey Road being installed, repaired or tested.
Perhaps you worked for Timaru Borough Council, an electrical contractor, the electricity department or Civil Defence.
Perhaps you have a photograph showing the siren or its pole in an earlier decade.
I'm also interested in memories of wartime Timaru, particularly the Home Guard at Washdyke racecourse, school air raid drills and the old defences around Caroline Bay.
The questions I would especially like to answer are:
When was the Grey Road pole erected, and when was the siren fitted?
Who manufactured the machine, and has it been replaced?
Who selected the location, and what area was it intended to warn?
Who installed and maintained the equipment?
What happened to the older sirens recorded in storage in 2024?
Does anyone have photographs or memories of the original installations?
Sometimes a history hunt is solved by a photograph, an old invoice, a newspaper clipping or somebody who remembers the person who did the work.
If you can help, please get in touch with WuHoo Timaru.
SOURCES, RESOURCES AND FURTHER READING
GREY ROAD SIREN AND CIVIL DEFENCE HISTORY
Timaru District Council (2021). Environmental Services Committee Agenda, 8 June 2021. Item 7.2, Review of Public Alerting Siren System, including the inventory identifying Siren 03 at Grey Road and North Street.
https://www.timaru.govt.nz/__data/assets/pdf_file/0003/535485/Environmental-Services-Committee-Agenda-08.06.21.pdf
Timaru District Council (2015). Civil Defence Plan: Strategy, Activity Management Plan 2015–2025 and Work Programme. Written by Lamorna Cooper. Pages 52–53 provide the approximate dating of the siren network and information about maintenance and corrosion.
https://www.timaru.govt.nz/__data/assets/pdf_file/0007/44179/960701-Civil-Defence-Plan-Strategic-and-Activity-Management-Plan-and-Work-Programme-2015-2025-version-2-CURRENT.pdf
Morris, Brendan, and Graham Leonard (2013). The Use of Sirens for Tsunami Warning in New Zealand. Prepared for the Ministry of Civil Defence and Emergency Management. See page 21 for Timaru's installation history.
https://www.civildefence.govt.nz/assets/Archive/The-use-of-sirens-for-tsunami-warning-in-New-Zealand.pdf
Timaru District Council (2024). Environmental Services Committee Agenda, 8 October 2024. Item 8.1, Public Alerting Siren System Upgrade – Completion Report. Includes the proposed removal of older sirens, the Grey Road installation and museum interest.
https://www.timaru.govt.nz/__data/assets/pdf_file/0005/937544/Environmental-Services-Committee-AGENDA-08.10.2024.pdf
WARTIME TIMARU AND SURVIVING BUILT HERITAGE
Timaru District Council. Historic Heritage Assessment HHI82: Former World War II Timaru Borough Council Public Air Raid Shelter. Includes Station Street, Robert J. Comrie, construction history and contemporary newspaper references.
https://www.timaru.govt.nz/__data/assets/pdf_file/0011/673904/Historic-Heritage-Assessment-Report-HHI82-Former-World-War-II-Timaru-Borough-Council-Public-Air-Raid-Shelter-Category-A-NEW.pdf
Heritage New Zealand Pouhere Taonga. Timaru Coast Defence Battery, Smithfield, List No. 7761. Documents the wartime coastal defences constructed in 1942.
https://www.heritage.org.nz/list-details/7761/Timaru%2BCoast%2BDefence%2BBattery
WuHoo Timaru. Caroline Bay Viaduct Gate Hinges. Local history and observations of the surviving iron fittings beneath the railway viaduct at Virtue Avenue.
https://www.wuhoo.nz/war-tour/1280-10-caroline-bay-viaduct-gate-hinges
WuHoo Timaru. Timaru Main School War Memorial and Air-Raid-Trench Memory. Local oral-history recollection of wartime school practices.
https://www.wuhoo.nz/war-tour/1282-12-timaru-main-school-war-memorial-and-air-raid-trench-memory
WuHoo Timaru. Ashbury Park and the Home Guard. Wartime photographs and information about the Timaru and Washdyke Home Guard.
https://www.wuhoo.nz/war-tour/1289-19-ashbury-park-and-the-home-guard
Ministry for Culture and Heritage. The Second World War at Home – Challenges. National context for blackouts, Home Guard activity and wartime precautions.
https://nzhistory.govt.nz/war/second-world-war-at-home/challenges
TSUNAMI HISTORY AND EMERGENCY PREPAREDNESS
Johnston, David, and colleagues (2008). “Developing an Effective Tsunami Warning System: Lessons from the 1960 Chile Earthquake Tsunami for New Zealand Coastal Communities.” Kōtuitui: New Zealand Journal of Social Sciences Online, Volume 3, Issue 2, pages 105–120. Includes historical accounts of the 1960 tsunami response in Timaru.
https://doi.org/10.1080/1177083X.2008.9522436
National Emergency Management Agency. Tsunami – Get Ready. Current official guidance on tsunami warning signs and evacuation.
https://getready.govt.nz/emergency/tsunami
HISTORICAL NEWSPAPERS
Timaru Herald, 20 December 1941; 27 April 1942; and 22 March 1944. Contemporary reports referred to in Council's Station Street air raid shelter heritage assessment.
Timaru Herald, 8 April 1943. “Temuka Alarm Sirens Wanted.”
Timaru Herald, 24 April 1943. “Geraldine Sirens Wake Babies.”
The two 1943 headlines are research leads; their full article texts still need checking.
Papers Past, National Library of New Zealand:
https://paperspast.natlib.govt.nz/newspapers
RESEARCH NOTES
The Grey Road siren's exact installation date, manufacturer, model and original purpose have not yet been established. The approximate 1950s and 1960s dates relate to the wider network, not necessarily this machine.
The account of Home Guard members camping overnight at Phar Lap Raceway was shared to me by someone who could remember her father in the home guard. The Timaru Main School memory is oral testimony, and the detailed engineering history of the Virtue Avenue gate fittings was also shared with me.
Council's October 2024 records do not establish whether the Grey Road siren was subsequently removed or what happened to the two sirens in storage.
These are questions I hope further local memories and research will help answer.
WuHoo Timaru – Making free, fun, meaningful.