Otavi fire, 15 September 2023 Otavi
The fire started on 15 September 2023 in Otavi, Namibia, and satellites saw it burning for 4 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 6,852 hectares from heat detections, spread across a single municipality.
It is the 45th largest in Otjozondjupa since 2016 (of 212 with a page). Number 30 in Namibia in 2023, of 111.
- Burnt area
- 6,852ha
- GWIS perimeter (Copernicus)
- Duration
- 4days
- 15 Sept 2023 – 18 Sept 2023
- Municipalities hit
- 1
- constituencies
- Started on
- 15 Sept
- 2023
- Heat detections
- 378
- in a single hotspot: 269 MW
- Danger at start
- 50
- Extreme · FWI index
- Energy released
- 6.2GW
- 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 more than two months without rain (1 mm or more) when it started.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
Otavi where it started6,902 ha reached on 14 Sept0.5 %
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) |
|---|---|---|---|---|---|
| 15 Sept | 34.3 °C | 6 % | 25 km/h | 0.0 mm | Extreme 50 |
| 16 Sept | 34.9 °C | 5 % | 23 km/h | 0.0 mm | Extreme 54 |
| 17 Sept | 33.4 °C | 8 % | 40 km/h | 0.0 mm | Extreme 62 |
| 18 Sept | 34.4 °C | 8 % | 30 km/h | 0.0 mm | Extreme 58 |
| 19 Sept after | 34.0 °C | 6 % | 31 km/h | 0.0 mm | Extreme 60 |
| 20 Sept after | 33.4 °C | 8 % | 39 km/h | 0.0 mm | Extreme 63 |
| 21 Sept after | 33.8 °C | 14 % | 41 km/h | 0.2 mm | Extreme 57 |
| 22 Sept after | 31.6 °C | 18 % | 32 km/h | 0.9 mm | Very high 38 |
| 23 Sept after | 31.2 °C | 18 % | 37 km/h | 0.0 mm | Very high 44 |
| 24 Sept after | 32.6 °C | 12 % | 53 km/h | 0.0 mm | Extreme 63 |
| 25 Sept after | 26.8 °C | 8 % | 40 km/h | 0.0 mm | Extreme 53 |
| 26 Sept after | 26.6 °C | 12 % | 46 km/h | 0.0 mm | Extreme 59 |
| 27 Sept after | 28.1 °C | 10 % | 37 km/h | 0.0 mm | Extreme 52 |
| 28 Sept after | 32.0 °C | 8 % | 35 km/h | 0.0 mm | Extreme 53 |
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 · 378Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
Frequently asked questions
- How long did the Otavi fire last?
- GWIS (Copernicus) dates it between 15 September 2023 and 18 September 2023: 4 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 6,852 hectares (68.5 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Otavi (6,902 ha, 0.5 %).
- What was the weather like?
- During the fire the temperature reached 34.9 °C, humidity dropped to 5 % and gusts hit 40 km/h. The fire danger index (FWI) reached 62, class Extreme.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Namibia (OCHA COD-AB). 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.
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 OCHA COD-AB (Namibia Statistics Agency (NSA)) (Creative Commons Attribution for Intergovernmental Organisations (CC BY-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.