Cederberg fire, May 2017 Cederberg
The fire started on 17 May 2017 in Cederberg, South Africa, and satellites saw it burning for 6 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,129 hectares from heat detections, spread across a single municipality.
It is the 116th largest in Western Cape since 2016 (of 164 with a page). Number 77 in South Africa in 2017, of 128.
- Burnt area
- 3,129ha
- GWIS perimeter (Copernicus)
- Duration
- 6days
- 17 May 2017 – 22 May 2017
- Municipalities hit
- 1
- municipalities
- Started on
- 17 May
- 2017
- Heat detections
- 136
- in a single hotspot: 38 MW
- Danger at start
- 22
- High · FWI index
- Energy released
- 1.2GW
- sum of detected power
Where it burned
How it evolved, day by day
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
It had gone 15 days without rain (1 mm or more) when it started. Rain came after the fire: 2.3 mm on 26 May.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
Cederberg where it started3,139 ha reached on 17 May0.4 %
Burnt area inside each municipality, from crossing the GWIS perimeter with administrative boundaries. The distance is from the town centre to the nearest fire: staying a kilometre away does not mean it reached the houses.
The weather day by day
ECMWF ERA5 reanalysis at the fire location, the standard reference for past weather, and the Canadian Fire Weather Index (the same system Copernicus uses), computed by WorldFires from that data. Days after the fire run until the first rain.
Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 17 May | 18.2 °C | 57 % | 24 km/h | 0.0 mm | High 22 |
| 18 May | 22.5 °C | 24 % | 18 km/h | 0.0 mm | High 26 |
| 19 May | 25.4 °C | 22 % | 22 km/h | 0.0 mm | High 28 |
| 20 May | 24.5 °C | 26 % | 18 km/h | 0.0 mm | High 30 |
| 21 May | 26.2 °C | 18 % | 24 km/h | 0.0 mm | High 32 |
| 22 May | 24.0 °C | 22 % | 24 km/h | 0.0 mm | High 33 |
| 23 May after | 27.1 °C | 11 % | 45 km/h | 0.0 mm | Very high 49 |
| 24 May after | 19.4 °C | 39 % | 25 km/h | 0.0 mm | High 29 |
| 25 May after | 16.3 °C | 61 % | 23 km/h | 0.0 mm | Moderate 19 |
| 26 May after | 13.3 °C | 80 % | 21 km/h | 2.3 mm | Very low 3 |
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
If the day is cloudy, change the date: each satellite passes once a day. In false colour the burnt ground looks brown or red.
Detections table · 136Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 17,819 haCederbergMarch 2025 · 12 days · 31 km away
- 4,784 haCederbergJanuary 2021 · 4 days · 31 km away
- 5,748 haCederbergJanuary 2017 · 8 days · 32 km away
- 53,532 haCederbergDecember 2025 · 14 days · 38 km away
- 20,892 haCederbergDecember 2016 · 7 days · 38 km away
- 3,839 haBergrivierMarch 2021 · 8 days · 38 km away
Frequently asked questions
- How long did the Cederberg fire last?
- GWIS (Copernicus) dates it between 17 May 2017 and 22 May 2017: 6 days between the first and last heat detection of the perimeter.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,129 hectares (31.3 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Cederberg (3,139 ha, 0.4 %).
- What was the weather like?
- During the fire the temperature reached 26.2 °C, humidity dropped to 18 % and gusts hit 24 km/h. The fire danger index (FWI) reached 33, class High.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of South Africa (geoBoundaries). It is not an official report.
Where to verify it
A satellite detection is not an official report. Final figures and the fire’s status are published by each country’s emergency service.
Emergency number: 10177 · 112
Satellite cross-check
Does something look wrong on this page?
This page is built from satellite data and official records, and it sometimes gets things wrong: the wrong dates, the wrong town, two fires merged into one, or something that was not a wildfire at all. If you know this fire first-hand (you live nearby, saw it, fought it or reported on it), tell us what really happened and we will check it.
Report an error
Where this data comes from
The perimeter comes from the Copernicus Global Wildfire Information System (GWIS), which rebuilds it from MODIS and VIIRS heat detections and publishes it under CC BY 4.0. It is not measured on imagery as in Europe, so it is an estimate. Heat detections come from the VIIRS sensors aboard Suomi-NPP and NOAA-20, distributed by NASA FIRMS at 375 m resolution. Municipal boundaries come from geoBoundaries ADM3 (Creative Commons Attribution 3.0 Intergovernmental Organisations (CC BY 3.0 IGO)). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ from each country’s official figure.