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Cyclone Tracy
Category 4 severe tropical cyclone (Aus scale)
Category 3 tropical cyclone (SSHWS)
Cyclone Tracy 25 December 1974 ESSA-8.png
Cyclone Tracy on 25 December 1974
Formed 21 December 1974 (1974-12-21)
Dissipated 26 December 1974 (1974-12-26)
Highest winds 10-minute sustained: 175 km/h (110 mph)
1-minute sustained: 205 km/h (125 mph)
Gusts: 240 km/h (150 mph)
Lowest pressure 950 hPa (mbar); 28.05 inHg
Fatalities 71
Damage $645.35 million (1974 USD)
Areas affected Tiwi Islands, Northern Territory

Cyclone Tracy was a tropical cyclone that devastated the city of Darwin, Northern Territory, Australia from 24 to 26 December 1974.

The small, developing easterly storm had been observed passing clear of the city initially, but then turned towards it early on 24 December. After 10:00 p.m. ACST, damage became severe, and wind gusts reached 217 kilometres per hour (134.84 mph) before instruments failed. The anemometer in Darwin Airport control tower had its needle bent in half by the strength of the gusts.

Residents of Darwin were celebrating Christmas, and did not immediately acknowledge the emergency, partly because they had been alerted to an earlier cyclone (Selma) that passed west of the city, and did not impact it in any way. Additionally, news outlets had only a skeleton crew on duty over the holiday.

Tracy killed 71 people, caused A$837 million in damage (1974 dollars), or approximately A$6.85 billion (2018 dollars), or $4.79 billion 2018 USD. It destroyed more than 70 percent of Darwin's buildings, including 80 percent of houses. It left more than 25,000 out of the 47,000 inhabitants of the city homeless prior to landfall and required the evacuation of over 30,000 people, of whom many never returned. After the storm passed, the city was rebuilt using more stringent standards "to cyclone code". The storm was the second-smallest tropical cyclone on record (in terms of gale-force wind diameter), behind only Tropical Storm Marco in 2008.

Meteorological history

On 20 December 1974, the United States' ESSA-8 environmental satellite recorded a large cloud mass centred over the Arafura Sea about 370 kilometres (230 mi) northeast of Darwin. This disturbance was tracked by the Darwin Weather Bureau's regional director Ray Wilkie, and by senior meteorologist Geoff Crane. On 21 December 1974, the ESSA-8 satellite showed evidence of a newly formed circular centre near latitude 8° south and longitude 135° east. Crane - the meteorological duty officer at the time - issued the initial tropical cyclone alert describing the storm as a tropical low that could develop into a tropical cyclone.

Later in the evening, the Darwin meteorological office received an infrared satellite image from the National Oceanic and Atmospheric Administration's satellite, NOAA-4, showing that the low pressure had developed further and that spiralling clouds could be observed. The storm was officially pronounced a tropical cyclone at around 10 p.m. on 21 December, when it was around 200 kilometres (120 mi) to the north-northeast of Cape Don (360 kilometres (220 mi) northeast of Darwin). Cyclone Tracy was first observed on the Darwin radar on the morning of 22 December.

Over the next few days, the cyclone moved in a southwesterly direction, passing north of Darwin on 22 December. A broadcast on ABC Radio that day stated that Cyclone Tracy posed no immediate threat to Darwin. However, early in the morning of 24 December, Tracy rounded Cape Fourcroy on the western tip of Bathurst Island, and moved in a southeasterly direction, straight towards Darwin. The bureau's weather station at Cape Fourcroy measured a mean wind speed of 120 kilometres per hour (75 mph) at 9:00 that morning.

By late afternoon on 24 December, the sky over the city was heavily overcast, with low clouds, and was experiencing strong rain. Wind gusts increased in strength; between 10 p.m. (local time) and midnight, the damage became serious, and residents began to realise that the cyclone would not just pass by the city, but rather over it. On 25 December at around 3:30 a.m., Tracy's centre crossed the coast near Fannie Bay. The highest recorded wind gust from the cyclone was 217 kilometres per hour (135 mph), which was recorded around 3:05 a.m. at Darwin Airport. The anemometer (wind speed instrument) failed at around 3:10 a.m., with the wind vane (wind direction) destroyed after the cyclone's eye. The Bureau of Meteorology's official estimates suggested that Tracy's gusts had reached 240 kilometres per hour (150 mph). The lowest air pressure reading during Tracy was 950 hectopascals (28 inHg), which was taken at around 4 a.m., by a Bureau staff member at Darwin Airport. This was recorded during the eye of the cyclone. From around 6:30 a.m., the winds began to ease, with the rainfall ceasing at around 8:30 a.m. After making landfall, Tracy rapidly weakened, dissipating on 26 December.

Typhoonsizes
The relative sizes of the United States, Cyclone Tracy and Typhoon Tip, the second smallest and largest tropical storms ever recorded, respectively

Preparations

Darwin had been severely battered by cyclones before; in January 1897 and again in March 1937. However, in the 20 years leading up to Cyclone Tracy, the city had undergone a period of rapid expansion. E.P. Milliken estimated that on the eve of the cyclone there were 43,500 people living in 12,000 dwellings in the Darwin area. Though building standards at the time required that some attention be given to the possibility of cyclones, most buildings were not capable of withstanding the force of a cyclone's direct hit.

On the day of the cyclone, most residents of Darwin believed that the cyclone would not cause any damage to the city. Cyclone Selma had been predicted to hit Darwin earlier in the month, but it instead went north and dissipated without affecting Darwin in any way. As a result, Cyclone Tracy took most Darwin residents by surprise. Despite several warnings, the people of Darwin did not evacuate or prepare for the cyclone. Many residents continued to prepare for Christmas, and many attended Christmas parties, despite the increasing winds and heavy rain. Journalist Bill Bunbury interviewed the residents of Darwin some time later and recorded the experiences of the survivors of the cyclone in his book Cyclone Tracy, picking up the pieces. Resident Dawn Lawrie, a 1971 independent candidate for the electorate of Nightcliff, told him:

We'd had a cyclone warning only 10 days before Tracy [that another cyclone] was coming, it was coming, and it never came. So when we started hearing about Tracy we were all a little blasé. (Bunbury, p. 20)

Another resident, Barbara Langkrens, said:

And you started to almost think that it would never happen to Darwin even though we had cyclone warnings on the radio all the time ... most of the people who had lived here for quite some time didn't really believe the warnings. (Bunbury, p. 21)

Impact

Cyclone tracy aerial view darwin
Devastation wrought by Cyclone Tracy on the Northern Territory city of Darwin.
Courtesy – National Archives of Australia A6135, K29/1/75/16
Houses-after-tracy
Houses after the destruction caused by Tracy
House-after-tracy
House in Nakara, Northern suburbs, after Tracy
Hmas-attack
HMAS Arrow beached in Francis Bay March 1975
Power-pole-base
The base of a steel electricity pole bent by Tracy
Three Twisted House Girders
Memorial at Casuarina High School assembled from three house girders twisted by Cyclone Tracy

Cyclone Tracy killed at least 66 people. Two Royal Australian Navy (RAN) sailors died when HMAS Arrow, an Attack-class patrol boat, sank at Stokes Hill Wharf. The storm also caused the substantial destruction of the city of Darwin. At Darwin Airport, thirty-one aircraft were destroyed and another twenty-five badly damaged. The initial estimate put the reported death toll at 65, but it was revised upwards in March 2005 to 71, when the Northern Territory Coroner proclaimed that those six who still remained listed as missing had "perished at sea".

Several factors delayed the dissemination of the news of the cyclone's impact. The destruction of transportation infrastructure and the distance between Darwin and the rest of the Australian population played a role, as did the fact the storm made landfall on Christmas Day and most media outlets had only a skeleton crew rostered on at best. Most Australians were not aware of the cyclone until late in the afternoon. Dick Muddimer, a reporter for the local ABC radio station, 8DR, credited as being the man who informed the rest of the nation about the cyclone, after finding out that the ABC's studios on Cavenagh Street were completely knocked off transmission, was able to travel through the wreckage and the storm to the studios of the local television station NTD-8 to send a message to the ABC station in Mount Isa, Queensland notify ABC headquarters in Sydney that Darwin had been hit by a cyclone.

In order to provide the initial emergency response, a committee was created. The committee, composed of several high-level public servants and police, stated that, "Darwin had, for the time being, ceased to exist as a city". Gough Whitlam, the Australian Prime Minister, was touring Syracuse, Sicily at the time and flew to Darwin upon hearing of the disaster. Additionally, the Australian government began a mass evacuation by road and air; all of the Defence Force personnel throughout Australia, along with the entire Royal Australian Air Force's fleet of transport planes, were recalled from holiday leave and deployed to evacuate civilians from Darwin, as well as to bring essential relief supplies to the area. Thirteen RAN ships were used to transport supplies to the area as part of Operation Navy Help Darwin; the largest humanitarian or disaster relief operation ever performed by the Navy.

Health and essential services crisis

As soon as the worst of the storm had passed, Darwin faced several immediate health crises. On Christmas Day, the Darwin Hospital treated well over five hundred patients, with 112 of these being admitted into the hospital, and both of the facility's operating theatres being utilised. The first casualties did not arrive till 7 a.m. because of high winds and severe road conditions in and around the Darwin area. Operating continued throughout the night and into the early morning. Local teams worked without relief until the arrival of a surgical team from Canberra late that day. Those who were considered unable to return to work within two weeks were evacuated by air to safer locations.

All official communications out of Darwin were no longer operational. The antennas at the OTC Coastal Radio Service station (callsign VID) were destroyed during the storm. Station manager Bob Hooper, who was an amateur radio operator, helped to establish communications using his own equipment. By 10 a.m. Gary Gibson, another amateur operator, was able to establish a station at the Darwin Community College, and within a short period of time, a network of stations was established across the country. This network, coordinated by Melbourne D24 police, provided message services to the cities of Perth, Melbourne, Sydney, Canberra, Townsville, Brisbane, Adelaide, Alice Springs, Gove, Mt Isa, Cairns, Rockhampton, MacKay, Lismore, and Cooma. By 10:40 a.m. VID operators had established VID2 on board the MV Nyanda in Darwin Harbour, and then for five days official communications traffic in and out of Darwin was handled via continuous wave radio (Morse code). The only local radio station that wasn't completely disabled was the ABC's 8DR. For the next two days, it was Darwin's only link to the outside world and was on the air for all but 34 hours in the coming weeks.

Those who remained in Darwin faced the threat of several diseases due to much of the city being without water, electricity or basic sanitation. An initial response was to vaccinate residents for typhoid and cholera. Approximately 30,000 people were homeless and were forced to seek shelter in several makeshift housing and emergency centres that lacked proper hygienic conditions. Volunteers came in from across the country to assist with the emergency relief efforts. Trench latrines were dug; water supplies delivered by tankers, and mass immunisation programs begun. The army was given the task of searching houses for people and animals, as well as locating other health risks; for example, cleaning out rotting contents from fridges and freezers across the city. This was completed within a week. Houses which had been 'searched and cleared' had S&C painted on an external wall. The city itself was sprayed with malathion to control mosquitoes and other similar pests.

Attempts to reconnect the essential services to the city began on Christmas Day. Local officers from the Commonwealth Department of Housing and Construction began clearing debris and working to restore power. They sealed off damaged water hydrants and activated pumps to reactivate the city's water and sewerage systems.

Aftermath

Reconstruction and effects on Darwin

In February 1975, Whitlam announced the creation of the Darwin Reconstruction Commission, which was given the task of rebuilding the city "within five years", focusing primarily on building houses. The Commission was headed by Tony Powell. The damage to the city was so severe that some advocated moving the entire city. However, the government insisted that it be rebuilt in the same location. By May 1975, Darwin's population had recovered somewhat, with 30,000 residing in the city. Temporary housing, caravans, hotels and an ocean liner, MV Patris, were used to house people, as reconstruction of permanent housing had not yet begun by September that year. Ella Stack became Mayor of Darwin in May 1975 and was heavily involved in its reconstruction.

However, by the following April, and after receiving criticism for the slow speed of reconstruction, the Commission had built 3,000 new homes in the nearly destroyed northern suburbs, and completed repairs to those that had survived the storm. Several new building codes were drawn up, trying to achieve the competing goals of the speedy recovery of the area and ensuring that there would be no repeat of the damage that Darwin took in 1974. By 1978, much of the city had recovered and was able to house almost the same number of people as it had before the cyclone hit. However, by the 1980s, as many as sixty percent of Darwin's 1974 population had left, never to return. In the years that followed, Darwin was almost entirely rebuilt and now shows almost no resemblance to the pre-Tracy Darwin of December 1974.

Although a Legislative Assembly had been set up earlier in the year, the Northern Territory had only minimal self-government, with a federal minister being responsible for the Territory from Canberra. However, the cyclone and subsequent responses highlighted several problems with the way the regional government was set up. This led Malcolm Fraser, Whitlam's successor as Prime Minister, to give self-government to the Territory in 1978.

Many of the government records associated with Cyclone Tracy became publicly available on 1 January 2005 under the 30-year rule.

In popular culture

Cyclone Tracy inspired the song "Santa Never Made It into Darwin", composed by Bill Cate and performed by Bill and Boyd in 1975 to raise money for the relief and reconstruction efforts. In 1983 Hoodoo Gurus released "Tojo", a song comparing the Japanese bombing of Darwin under the command of Hideki Tojo during World War II to the damage done by Cyclone Tracy. The much feared Japanese invasion never happened, but the cyclone was virtually ignored and ended up destroying the city. In May 1976, Australian band Ayers Rock released the single "Song for Darwin", also as a fund raiser for the relief and reconstruction efforts.

In 1986, the Nine Network and PBL created Cyclone Tracy, a period drama mini-series based on the events during the cyclone. Michael Fisher, Ted Roberts and Leon Saunders wrote the series, and it starred Chris Haywood and Tracy Mann, who played the lead characters of Steve and Connie. The mini-series was released on DVD by Umbrella Entertainment in December 2005. The DVD is compatible with all region codes and includes special features such as newsreel footage of the devastation and a documentary titled On A Wind and a Prayer.

Records and meteorological statistics

Tracy is the most compact cyclone or equivalent-strength hurricane on record in the Australian basin and Southern Hemisphere, with gale-force winds extending only 48 kilometres (30 mi) from the centre, and was also the smallest tropical cyclone worldwide until 2008, when Tropical Storm Marco of the 2008 Atlantic hurricane season broke the record, with gale-force winds extending only 19 kilometres (12 mi) from the centre. After forming over the Arafura Sea, the storm moved southwards and affected the city with Category 4 winds on the Australian cyclone intensity scale, while there is evidence to suggest that it had reached Category 3 on the Saffir-Simpson Hurricane Scale when it made landfall. Bruce Stannard of The Age stated that Cyclone Tracy was a "disaster of the first magnitude ... without parallel in Australia's history."

Pressure estimates

David Longshore, in the book Encyclopedia of Hurricanes, Typhoons, and Cyclones 2008 edition, states that Tracy's barometric pressure was as low as 914 mbar, but the actual lowest pressure was 950 mbar. This information was recorded by a Bureau of Meteorology staff member at the Darwin airport.

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