NZ Historic Weather Events Catalogue

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May 1945 Canterbury and Otago Flooding ( 1945-05-18 )

Heavy rain, flooding and slips were experienced in parts of Canterbury and Otago, including Christchurch and Dunedin. Roads and farmlands were damaged. A landslide in Auckland also damaged property.

New Zealand

Multi HazardMulti Hazard at New Zealand
Duration:   4  days - From the 18th to the 21st of May.
Comments:

Auckland

LandslideLandslide at Point Chevalier Beach
Map Location: -36.854269 174.702381
Comments:

Property DamageA landslide caused hundreds of pounds worth of damage to two properties overlooking the southern end of Point Chevailer Beach. 1/3 of an acre of land slipped away during torrential rain, uprooting treets and carrying away asphalt paths, gardens seats and parts of lawn. Abnormal rains had penerated the soil to the papa rock, and with the greasy surface, caused the earth to slide away.

Canterbury

FloodingFlooding at Canterbury
Comments:

CommentHeavy rains throughout Canterbury caused extensive flooding on the 20th.

CommentCreeks overflowed their banks.

Affected LifelineSerious damge was done to roads and bridges. Some bridges were washed away.

Property DamageSerious damge was done to private property.

DamageDamage was done in most districts, the worst in those districts near Banks Peninsula.

Crop DamageThe flooding was expected to have a serious effect on wheat growing in North Canterbury, with crops already sown washed away.

CommentSurface water was extensive in North Canterbury.

Heavy RainHeavy Rain
Comments:

CommentRain occurred largely in coastal areas.

CommentMany districts north of Christchurch experienced heavy rain for some days.

LandslideLandslide
Comments:

Affected LifelineMany slips occurred.

Affected LifelineExtensive slips on northern sections of the main trunk railway caused dislocation of services.

Multi HazardMulti Hazard
Comments:

Affected LifelineBoth road and rail between Christchurch and Little River were suspended by slips and flood waters.

Damage CostDamage to roads in the Waimate, Geraldine, Ashburton, Waiwera and Akaroa counties totalled £43,170 ($3,147,900 2008 dollars).

Damage CostDamage to main highways in the province totalled £10,670 ($778,000 2008 dollars).

Damage CostDamage to state highways in the province totalled £3,420 ($249,400 2008 dollars).

Maritime / CoastalMaritime / Coastal
Comments:

CommentThe period of violent weather coincided with very high tides.

Heavy RainHeavy Rain at Akaroa
Map Location: -40.550829 176.262494
Comments:

Physical CharacteristicAkaroa recorded 12.5 in (31.8 cm) of rain in three days.

EvacueesPeople were evacuated in Akaroa when water flowed through houses.

Affected LifelineAkaroa suffered a loss of water supply.

FloodingFlooding at Banks Peninsula
Map Location: -43.73644 173.024672
Comments:

Stock DamageThere were serious stock losses on the peninsula.

LandslideLandslide
Comments:

Affected LifelineThere were numerous slips in Akaroa county on the main road to Christchurch and on the Wainui and French Farm roads.

Heavy RainHeavy Rain at Christchurch
Map Location: -43.53112 172.636147
Comments:

Physical CharacteristicChristchurch recorded 2.70 in (6.9 cm) of rain in 48 hours.

Physical CharacteristicCashmere recorded 9.25 in (23.5 cm) of rain in three days.

Physical CharacteristicThe Drainage Board pumping station in Tuam Street recorded 2.4 in (6.1 cm) of rain in 24 hours.

CommentHeavy rain was driven by a high south-westerly wind.

FloodingFlooding
Comments:

CommentThere was flooding of an unprecedented scale in Christchurch. The city suffered its worst flooding for 35 years.

ImpactThe Heathcote and Avon Rivers overflowed their banks.

EvacueesHomes in low-lying parts of Christchurch were evacuated. Houses were evacuated adjacent to the Heathcote River in Spreydon, Beckenham, Woolston and Opawa.

ImpactThe residents of four more houses in Richardson Terrace and Claredon Terrace had to be rescued.

Affected LifelineWater covered Western Terrace (now Waimea Terrace).

Physical CharacteristicThe flood waters in Waimea Terrace were 4 ft (1.2 m) deep on the roadway.

CommentNatural and artificial drainage channels proved inadequate to carry off water.

Affected LifelineChristchurch streets were invaded by flood waters to a degree unprecedented in the memory of many long-service local body officers.

CommentSuburbs that suffered the most were Spreydon, Beckenham, St Martins and Woolston, but in almost every district there were large areas of surface flooding. Papanui, Addington and Fendalton all had flooding in a greater or lesser degree.

Physical CharacteristicThe water rose 2 ft (90 cm) above the floor level of some of the houses.

Affected LifelineThe Avon River was running fence to fence over the adjacent road from the Avon Girls High School down.

Affected LifelineThere was surface flooding in Moorhouse Avenue, particularly near Waltham Road.

Affected LifelineFlooding caused several breaks in telephone cables in the Riccarton, St Albans and Ferry Road districts.

FloodingFlooding at Dog Kennel Stream
Map Location: -44.830991 171.084428
Comments:

Affected LifelineThe Dog Kennel Creek bridge was gone.

FloodingFlooding at Flaxton
Map Location: -43.354224 172.627951
Comments:

ImpactThe worst surface flooding in the big area between the Waimakariri and Ashley Rivers was at Flaxton, where paddocks aggregating 150-200 acres were under water, mainly pastural lands.

FloodingFlooding at Geraldine
Map Location: -44.091052 171.227259
Comments:

Affected LifelineThe road to Geraldine had to be closed.

Affected LifelineA pole in the electric power transmission line feeding the Geraldine County was washed out in the Opihi riverbed, leaving the county without power.

FloodingFlooding at Lake Forsyth
Map Location: -43.80321 172.74077
Comments:

CommentLake Forsyth rose to the highest level it had reached for many years.

Affected LifelineWater from the lake washed out railway lines in several places.

FloodingFlooding at Little River
Map Location: -43.769095 172.782518
Comments:

DamageConsiderable damage occurred at Little River. 4 ft water covered some areas, layer of silt 6 in deep covered main road

EvacueesSeveral families were forced to leave their homes. At Little River itself, five families had to leave their homes.

Affected LifelineThe main road was completely blocked by water from Lake Forsyth, isolating the township of Little River.

Physical CharacteristicSome areas were covered by 4 ft (1.2 m) of water.

Affected LifelineA layer of silt 6 in (15 cm) deep covered the main road.

LandslideLandslide
Comments:

Affected LifelineExtensive slips on the Little River railway line caused dislocation of services.

Multi HazardMulti Hazard at Lyttelton
Map Location: -43.601111 172.721186
Comments:

Affected LifelineLyttleton received a severe buffeting, with several minor slips, and scouring on hill roads in the town.

Affected LifelineThe street lighting system was out of order.

FloodingFlooding at Skipton Reserve
Map Location: -44.078773 170.972855
Comments:

Affected LifelineThe approaches were washed away from a temporary bridge at Skipton.

Heavy RainHeavy Rain at Temuka
Map Location: -44.235045 171.28436
Comments:

Physical CharacteristicTemuka recorded 4.45 in (11.3 cm) of rain in 48 hours.

FloodingFlooding
Comments:

Affected LifelineTwo spans of the state highway bridge over the Temuka River collapsed.

Heavy RainHeavy Rain at Timaru
Map Location: -44.398445 171.2552
Comments:

Physical CharacteristicTimaru Botanic Gardens recorded 2.94 in (7.5 cm) of rain in three days from 9am on the 18th to 9am on the 21st.

FloodingFlooding
Comments:

Physical CharacteristicSaltwater Creek overflowed at Timaru, and 6 ft (1.8 m) of water flooded the area.

ImpactProperties and market gardens were inundated, and houses were threatened by flood water.

EvacueesThree families were evacuated as a precautionary measure.

Physical CharacteristicAt Timaru Airport, Saltwater Creek, the water was 6 ft (1.8 m) deep near the adminstration block.

FloodingFlooding at Waihao River
Map Location: -44.787437 171.009356
Comments:

Affected LifelineThe southern approach of the northern Waihao River bridge was washed out.

Heavy RainHeavy Rain at Waimakariri River
Map Location: -43.389571 172.711662
Comments:

Physical CharacteristicThe Waimakariri River Trust office at the Waimakariri bridge recorded 1.5 in (3.8 cm) of rain in 24 hours. This was the heaviest 24-hour rainfall.

FloodingFlooding at Waimate
Map Location: -44.7333 171.055364
Comments:

Affected LifelineFlood water held up traffic north and south of Waimate.

Affected LifelineThe Waimate Creek bridge approaches were washed out.

Otago

FloodingFlooding at Otago
Comments:

Affected LifelineRoads were damaged by scouring.

Property DamageFarm lands were damaged.

Heavy RainHeavy Rain at Dunedin
Map Location: -45.87911 170.502707
Comments:

Physical CharacteristicDunedin recorded 5.5 in (14.0 cm) of rain in 24 hours on the 19th.

FloodingFlooding
Comments:

CommentHeavy rain on the 19th caused most serious flood in Dunedin in many years.

CommentLindsay Creek and the Water of the Leith rose in high flood in a few hours.

ImpactSome houses in North East Valley and suburban gardens were flooded.

Affected LifelineTram services to Normanby were suspended.

CommentSouth Dunedin experienced serious flooding.

Physical CharacteristicGrosvenor Street, Kensington, was flooded with water 18 in (46 cm) deep.

CommentThere was serious flooding in many parts of the city.

CommentThe North East Valley district was the area most seriously affected.

ImpactLindsay Creek rose in high flood and water invaded some of the houses in Miller and Selwyn Streets.

Affected LifelineLindsay Creek burst its banks at the quarry, swept through a corrugated iron fence and poured down the Main North Road.

Physical CharacteristicThere was 1 ft (30 cm) of water in the streets from Lindsay Creek.

ImpactIn the Glenroy area, some residents were preparing to evacuate their premises.

LandslideLandslide
Comments:

Affected LifelineRoads around Dunedin were blocked by slips.

LandslideLandslide at Mihiwaka
Map Location: -45.777846 170.612495
Comments:

Affected LifelineRailway services were interrupted by slips at Mihiwaka.

FloodingFlooding at Otokia
Map Location: -45.949576 170.189377
Comments:

Affected LifelineThe railway line was blocked by water at Otokia.

LandslideLandslide at Port Chalmers
Map Location: -45.819968 170.626226
Comments:

Affected LifelineA slip came down on the railway line near Port Chalmers.

Heavy RainHeavy Rain at Ross Creek Reservoir
Map Location: -45.845732 170.498979
Comments:

Physical CharacteristicRoss Creek recorded 4.00 in (10.2 cm) of rain in 12 hours on the 19th.

Physical CharacteristicRoss Creek recorded 2.25 in (5.7 cm) of rain in four hours on the 19th.

Heavy RainHeavy Rain at Sullivans Dam
Map Location: -45.80621 170.524475
Comments:

Physical CharacteristicSullivan's Dam recorded 3.37 in (8.6 cm) of rain in 12 hours on the 19th.

Physical CharacteristicSullivan's Dam recorded 1.87 in (4.7 cm) of rain in four hours on the 19th.

Heavy RainHeavy Rain at Taieri Plain
Map Location: -45.88401 170.253762
Comments:

Physical CharacteristicTaieri recorded 3.12 in (7.9 cm) of rain in 12 hours on the 19th.

Physical CharacteristicTaieri recorded 1.27 in (3.2 cm) of rain in four hours on the 19th.

FloodingFlooding
Comments:

ImpactThe Taieri Plains were flooded when rivers overflowed or burst their banks, inundating hundreds of acres.

References

Cowie, C.A.; Attwood, A.K. (1957). Floods in New Zealand 1920-1953. The Soil Conservation Control Council, Wellington, New Zealand.
Headline: Bus passengers stranded.
The Press, 21 May 1945.
Headline: Floods in South Canterbury.
The Press, 21 May 1945.
Headline: Heavy rain in Dunedin.
The Press, 21 May 1945.
Headline: Highways suffer little.
The Press, 21 May 1945.
Headline: Landslide at Auckland.
The Press, 21 May 1945.
Headline: Rivers in North Canterbury.
The Press, 21 May 1945.
The Press, 21 May 1945. Severe flooding in Christchurch, Homes evacuated in suburbs.
The Press, 21 May 1945. Unprecedented flooding.

May 1945 Canterbury and Otago Flooding ( 1945-05-18 )

Heavy rain, flooding and slips were experienced in parts of Canterbury and Otago, including Christchurch and Dunedin. Roads and farmlands were damaged. A landslide in Auckland also damaged property.

New Zealand

Multi HazardMulti Hazard at New Zealand
Duration:   4  days - From the 18th to the 21st of May.
Comments:

Auckland

LandslideLandslide at Point Chevalier Beach
Map Location: -36.854269 174.702381
Comments:

Property DamageA landslide caused hundreds of pounds worth of damage to two properties overlooking the southern end of Point Chevailer Beach. 1/3 of an acre of land slipped away during torrential rain, uprooting treets and carrying away asphalt paths, gardens seats and parts of lawn. Abnormal rains had penerated the soil to the papa rock, and with the greasy surface, caused the earth to slide away.

Canterbury

FloodingFlooding at Canterbury
Comments:

CommentHeavy rains throughout Canterbury caused extensive flooding on the 20th.

CommentCreeks overflowed their banks.

Affected LifelineSerious damge was done to roads and bridges. Some bridges were washed away.

Property DamageSerious damge was done to private property.

DamageDamage was done in most districts, the worst in those districts near Banks Peninsula.

Crop DamageThe flooding was expected to have a serious effect on wheat growing in North Canterbury, with crops already sown washed away.

CommentSurface water was extensive in North Canterbury.

Heavy RainHeavy Rain
Comments:

CommentRain occurred largely in coastal areas.

CommentMany districts north of Christchurch experienced heavy rain for some days.

LandslideLandslide
Comments:

Affected LifelineMany slips occurred.

Affected LifelineExtensive slips on northern sections of the main trunk railway caused dislocation of services.

Multi HazardMulti Hazard
Comments:

Affected LifelineBoth road and rail between Christchurch and Little River were suspended by slips and flood waters.

Damage CostDamage to roads in the Waimate, Geraldine, Ashburton, Waiwera and Akaroa counties totalled £43,170 ($3,147,900 2008 dollars).

Damage CostDamage to main highways in the province totalled £10,670 ($778,000 2008 dollars).

Damage CostDamage to state highways in the province totalled £3,420 ($249,400 2008 dollars).

Maritime / CoastalMaritime / Coastal
Comments:

CommentThe period of violent weather coincided with very high tides.

Heavy RainHeavy Rain at Akaroa
Map Location: -40.550829 176.262494
Comments:

Physical CharacteristicAkaroa recorded 12.5 in (31.8 cm) of rain in three days.

EvacueesPeople were evacuated in Akaroa when water flowed through houses.

Affected LifelineAkaroa suffered a loss of water supply.

FloodingFlooding at Banks Peninsula
Map Location: -43.73644 173.024672
Comments:

Stock DamageThere were serious stock losses on the peninsula.

LandslideLandslide
Comments:

Affected LifelineThere were numerous slips in Akaroa county on the main road to Christchurch and on the Wainui and French Farm roads.

Heavy RainHeavy Rain at Christchurch
Map Location: -43.53112 172.636147
Comments:

Physical CharacteristicChristchurch recorded 2.70 in (6.9 cm) of rain in 48 hours.

Physical CharacteristicCashmere recorded 9.25 in (23.5 cm) of rain in three days.

Physical CharacteristicThe Drainage Board pumping station in Tuam Street recorded 2.4 in (6.1 cm) of rain in 24 hours.

CommentHeavy rain was driven by a high south-westerly wind.

FloodingFlooding
Comments:

CommentThere was flooding of an unprecedented scale in Christchurch. The city suffered its worst flooding for 35 years.

ImpactThe Heathcote and Avon Rivers overflowed their banks.

EvacueesHomes in low-lying parts of Christchurch were evacuated. Houses were evacuated adjacent to the Heathcote River in Spreydon, Beckenham, Woolston and Opawa.

ImpactThe residents of four more houses in Richardson Terrace and Claredon Terrace had to be rescued.

Affected LifelineWater covered Western Terrace (now Waimea Terrace).

Physical CharacteristicThe flood waters in Waimea Terrace were 4 ft (1.2 m) deep on the roadway.

CommentNatural and artificial drainage channels proved inadequate to carry off water.

Affected LifelineChristchurch streets were invaded by flood waters to a degree unprecedented in the memory of many long-service local body officers.

CommentSuburbs that suffered the most were Spreydon, Beckenham, St Martins and Woolston, but in almost every district there were large areas of surface flooding. Papanui, Addington and Fendalton all had flooding in a greater or lesser degree.

Physical CharacteristicThe water rose 2 ft (90 cm) above the floor level of some of the houses.

Affected LifelineThe Avon River was running fence to fence over the adjacent road from the Avon Girls High School down.

Affected LifelineThere was surface flooding in Moorhouse Avenue, particularly near Waltham Road.

Affected LifelineFlooding caused several breaks in telephone cables in the Riccarton, St Albans and Ferry Road districts.

FloodingFlooding at Dog Kennel Stream
Map Location: -44.830991 171.084428
Comments:

Affected LifelineThe Dog Kennel Creek bridge was gone.

FloodingFlooding at Flaxton
Map Location: -43.354224 172.627951
Comments:

ImpactThe worst surface flooding in the big area between the Waimakariri and Ashley Rivers was at Flaxton, where paddocks aggregating 150-200 acres were under water, mainly pastural lands.

FloodingFlooding at Geraldine
Map Location: -44.091052 171.227259
Comments:

Affected LifelineThe road to Geraldine had to be closed.

Affected LifelineA pole in the electric power transmission line feeding the Geraldine County was washed out in the Opihi riverbed, leaving the county without power.

FloodingFlooding at Lake Forsyth
Map Location: -43.80321 172.74077
Comments:

CommentLake Forsyth rose to the highest level it had reached for many years.

Affected LifelineWater from the lake washed out railway lines in several places.

FloodingFlooding at Little River
Map Location: -43.769095 172.782518
Comments:

DamageConsiderable damage occurred at Little River. 4 ft water covered some areas, layer of silt 6 in deep covered main road

EvacueesSeveral families were forced to leave their homes. At Little River itself, five families had to leave their homes.

Affected LifelineThe main road was completely blocked by water from Lake Forsyth, isolating the township of Little River.

Physical CharacteristicSome areas were covered by 4 ft (1.2 m) of water.

Affected LifelineA layer of silt 6 in (15 cm) deep covered the main road.

LandslideLandslide
Comments:

Affected LifelineExtensive slips on the Little River railway line caused dislocation of services.

Multi HazardMulti Hazard at Lyttelton
Map Location: -43.601111 172.721186
Comments:

Affected LifelineLyttleton received a severe buffeting, with several minor slips, and scouring on hill roads in the town.

Affected LifelineThe street lighting system was out of order.

FloodingFlooding at Skipton Reserve
Map Location: -44.078773 170.972855
Comments:

Affected LifelineThe approaches were washed away from a temporary bridge at Skipton.

Heavy RainHeavy Rain at Temuka
Map Location: -44.235045 171.28436
Comments:

Physical CharacteristicTemuka recorded 4.45 in (11.3 cm) of rain in 48 hours.

FloodingFlooding
Comments:

Affected LifelineTwo spans of the state highway bridge over the Temuka River collapsed.

Heavy RainHeavy Rain at Timaru
Map Location: -44.398445 171.2552
Comments:

Physical CharacteristicTimaru Botanic Gardens recorded 2.94 in (7.5 cm) of rain in three days from 9am on the 18th to 9am on the 21st.

FloodingFlooding
Comments:

Physical CharacteristicSaltwater Creek overflowed at Timaru, and 6 ft (1.8 m) of water flooded the area.

ImpactProperties and market gardens were inundated, and houses were threatened by flood water.

EvacueesThree families were evacuated as a precautionary measure.

Physical CharacteristicAt Timaru Airport, Saltwater Creek, the water was 6 ft (1.8 m) deep near the adminstration block.

FloodingFlooding at Waihao River
Map Location: -44.787437 171.009356
Comments:

Affected LifelineThe southern approach of the northern Waihao River bridge was washed out.

Heavy RainHeavy Rain at Waimakariri River
Map Location: -43.389571 172.711662
Comments:

Physical CharacteristicThe Waimakariri River Trust office at the Waimakariri bridge recorded 1.5 in (3.8 cm) of rain in 24 hours. This was the heaviest 24-hour rainfall.

FloodingFlooding at Waimate
Map Location: -44.7333 171.055364
Comments:

Affected LifelineFlood water held up traffic north and south of Waimate.

Affected LifelineThe Waimate Creek bridge approaches were washed out.

Otago

FloodingFlooding at Otago
Comments:

Affected LifelineRoads were damaged by scouring.

Property DamageFarm lands were damaged.

Heavy RainHeavy Rain at Dunedin
Map Location: -45.87911 170.502707
Comments:

Physical CharacteristicDunedin recorded 5.5 in (14.0 cm) of rain in 24 hours on the 19th.

FloodingFlooding
Comments:

CommentHeavy rain on the 19th caused most serious flood in Dunedin in many years.

CommentLindsay Creek and the Water of the Leith rose in high flood in a few hours.

ImpactSome houses in North East Valley and suburban gardens were flooded.

Affected LifelineTram services to Normanby were suspended.

CommentSouth Dunedin experienced serious flooding.

Physical CharacteristicGrosvenor Street, Kensington, was flooded with water 18 in (46 cm) deep.

CommentThere was serious flooding in many parts of the city.

CommentThe North East Valley district was the area most seriously affected.

ImpactLindsay Creek rose in high flood and water invaded some of the houses in Miller and Selwyn Streets.

Affected LifelineLindsay Creek burst its banks at the quarry, swept through a corrugated iron fence and poured down the Main North Road.

Physical CharacteristicThere was 1 ft (30 cm) of water in the streets from Lindsay Creek.

ImpactIn the Glenroy area, some residents were preparing to evacuate their premises.

LandslideLandslide
Comments:

Affected LifelineRoads around Dunedin were blocked by slips.

LandslideLandslide at Mihiwaka
Map Location: -45.777846 170.612495
Comments:

Affected LifelineRailway services were interrupted by slips at Mihiwaka.

FloodingFlooding at Otokia
Map Location: -45.949576 170.189377
Comments:

Affected LifelineThe railway line was blocked by water at Otokia.

LandslideLandslide at Port Chalmers
Map Location: -45.819968 170.626226
Comments:

Affected LifelineA slip came down on the railway line near Port Chalmers.

Heavy RainHeavy Rain at Ross Creek Reservoir
Map Location: -45.845732 170.498979
Comments:

Physical CharacteristicRoss Creek recorded 4.00 in (10.2 cm) of rain in 12 hours on the 19th.

Physical CharacteristicRoss Creek recorded 2.25 in (5.7 cm) of rain in four hours on the 19th.

Heavy RainHeavy Rain at Sullivans Dam
Map Location: -45.80621 170.524475
Comments:

Physical CharacteristicSullivan's Dam recorded 3.37 in (8.6 cm) of rain in 12 hours on the 19th.

Physical CharacteristicSullivan's Dam recorded 1.87 in (4.7 cm) of rain in four hours on the 19th.

Heavy RainHeavy Rain at Taieri Plain
Map Location: -45.88401 170.253762
Comments:

Physical CharacteristicTaieri recorded 3.12 in (7.9 cm) of rain in 12 hours on the 19th.

Physical CharacteristicTaieri recorded 1.27 in (3.2 cm) of rain in four hours on the 19th.

FloodingFlooding
Comments:

ImpactThe Taieri Plains were flooded when rivers overflowed or burst their banks, inundating hundreds of acres.

References

Cowie, C.A.; Attwood, A.K. (1957). Floods in New Zealand 1920-1953. The Soil Conservation Control Council, Wellington, New Zealand.
Headline: Bus passengers stranded.
The Press, 21 May 1945.
Headline: Floods in South Canterbury.
The Press, 21 May 1945.
Headline: Heavy rain in Dunedin.
The Press, 21 May 1945.
Headline: Highways suffer little.
The Press, 21 May 1945.
Headline: Landslide at Auckland.
The Press, 21 May 1945.
Headline: Rivers in North Canterbury.
The Press, 21 May 1945.
The Press, 21 May 1945. Severe flooding in Christchurch, Homes evacuated in suburbs.
The Press, 21 May 1945. Unprecedented flooding.