An unusually large south Atlantic storm struck the southern coast of
South Africa
South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic O ...
on 7 June 2017 with wind gusts as high as 120 km/h.
Wave heights of 9–12 metres were recorded between
Cape Columbine
Cape Columbine is well known for its lighthouse, the last staffed lighthouse built on the South African coast The Cape Columbine Lighthouse was commissioned on October 1, 1936. Both the headland and lighthouse derive their name from the barque ...
and
Cape Agulhas
Cape Agulhas (; , "Cape of Needles") is a rocky headland in Western Cape, South Africa. It is the geographic southern tip of Africa and the beginning of the traditional dividing line between the Atlantic and Indian oceans according to the In ...
.
The storm directly caused eight deaths and damaged 135 schools across the Western Cape. Around 800 homes were flooded across the city of
Cape Town
Cape Town is the legislature, legislative capital city, capital of South Africa. It is the country's oldest city and the seat of the Parliament of South Africa. Cape Town is the country's List of municipalities in South Africa, second-largest ...
due to the storm.
Despite dropping up to 50 mm of rain, the storm did not break the
Cape Town water crisis
The Cape Town water crisis in South Africa was a multi-year period in 2015–2020 of water shortage in the Western Cape region, most notably affecting the City of Cape Town. Dam water levels began decreasing in 2015 and the Cape Town water crisi ...
affecting the region.
Knysna fires

High winds of 50 km/h caused by the storm fueled around 20 to 30 significant fires that swept through the town of
Knysna
Knysna (; ) is a town with 76,150 inhabitants (2019 mid-year estimates) in the Western Cape province of South Africa. It is one of the destinations on the loosely defined Garden Route tourist route. It is situated 60 kilometres east of the c ...
and surrounding areas in the days after the storm. The fires killed seven people
and displaced around 10,000 with around 600 structures in Knysna and Plettenberg Bay being destroyed.
The fires were notable for involving the largest deployment of firefighters in South Africa to that date. A total of 985 firefighters along with 78 vehicles, ten helicopters, and two fixed winged aircraft were used in combating the fire between 6 June and 10 June 2017.
It is estimated that the fires caused between R4 billion and R5 billion (around US$297 million to US$372 million) in damages to private property with an additional R136 million worth of damage done to public infrastructure.
Unofficial preliminary conjecture suggested that some of the fires might have been lit by arsonists.
However, it was later found that the fires started as a result of lightning. Forensic scientist Dr David Klatzow ruled out arson as the cause of the Knysna fires which killed seven people and left many homeless.
See also
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June 2024 South African storm complex
On 1-5 June 2024, a large storm system produced severely heavy rainfall and winds along the Eastern coast of South Africa, striking several municipalities in the Eastern Cape and KwaZulu-Natal provinces. The storm produced two tornadoes in Newcas ...
*
2022 KwaZulu-Natal floods
In April 2022, days of heavy rain across KwaZulu-Natal in southeastern South Africa led to deadly floods. Particularly hard-hit were areas in and around Durban. At least 436 people died across the province, with an unknown number of people missi ...
*
2022 Eastern Cape floods
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Weather of 2017
The following is a list of weather events that occurred in 2017.
Summary by weather type
Winter storms and cold waves
Winter weather in 2017 kicked off January 4–8, 2017 North American winter storm, with a winter storm from January 4-8. Th ...
References
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2017 wildfires
Storms in South Africa
2017 in South Africa
June 2017 in South Africa
Wildfires in South Africa
2017 disasters in South Africa
2010s fires in Africa
2017 fires