Yaso fire, March 2021 Yaso
The fire started on 4 March 2021 in Yaso, Ethiopia, and satellites saw it burning for 10 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 5,077 hectares from heat detections, spread across a single municipality.
It is the 34th largest in Oromia since 2016 (of 264 with a page). Number 55 in Ethiopia in 2021, of 256.
Compare with…
Suggestions: Yaso · 2016Yaso · 2020Yaso · 2017Yaso · 2019
- Burnt area
- 5,077ha
- GWIS perimeter (Copernicus)
- Duration
- 10days
- 4 Mar 2021 – 13 Mar 2021
- Municipalities hit
- 1
- districts
- Started on
- 4 Mar
- 2021
- Heat detections
- 152
- in a single hotspot: 77 MW
- Danger at start
- 38
- High · FWI index
- Average daily power
- 113MW
- detected power per day, on average
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
99% of the perimeter overlaps earlier fires recorded since 2016: 3,954 ha in 2016, 3,452 ha in 2017, 1,687 ha in 2019, 3,656 ha in 2020. Part of it burned more than once, so the yearly figures add up to more than the 5,010 ha that had burned before.
- 1,977 ha Yaso fire, February 2016 3,111 ha in total; the hectares shown are those it shares with this fire
- 1,644 ha Yaso fire, February 2020 4,506 ha in total; the hectares shown are those it shares with this fire
- 1,493 ha Yaso fire, January 2017 3,499 ha in total; the hectares shown are those it shares with this fire
- 1,065 ha Yaso fire, January 2019 6,045 ha in total; the hectares shown are those it shares with this fire
- 572 ha Yaso fire, January 2017 11,905 ha in total; the hectares shown are those it shares with this fire
- 414 ha Ibantu fire, February 2016 2,506 ha in total; the hectares shown are those it shares with this fire
- 363 ha Yaso fire, January 2016 2,449 ha in total; the hectares shown are those it shares with this fire
- 52 ha Ibantu fire, February 2019 2,935 ha in total; the hectares shown are those it shares with this fire
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Paris boundary: geoBoundaries · Institut national de l'information géographique et forestière (IGN-F) (Etalab Open License 2.0).
Madrid boundary: geoBoundaries · Open Data ESRI, IGN Central Registry of Cartography Area (CC BY 4.0).
Berlin boundary: geoBoundaries · Federal Agency for Cartography and Geodesy (dl-de/by-2-0).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each town
-
Yaso where it started5,113 ha reached on 4 Mar2.0 %
Burnt area inside each municipality, from crossing the GWIS perimeter with administrative boundaries. The distance runs from the point marking the centre of each area to the nearest fire: staying a kilometre away does not mean it reached the houses.
People and buildings inside the perimeter
GHSL 2020Inside the perimeter there were about 0.21 hectares of built-up land and about 70 residents (GHSL 2020, satellite-based estimate).
This is an estimate on 100 m cells, made from satellite imagery and census data: it does not mean that homes burned or that anyone was harmed. The perimeter also contains land that never burned.
Source: Global Human Settlement Layer (GHS-BUILT-S and GHS-POP R2023A), European Commission Joint Research Centre (JRC), © European Union, CC BY 4.0. Sum inside the perimeter computed by WorldFires. human-settlement.emergency.copernicus.eu
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) |
|---|---|---|---|---|---|
| 6 Mar | 33.1 °C | 14 % | 30 km/h | 0.0 mm | High 38 |
| 7 Mar | 31.7 °C | 15 % | 32 km/h | 0.0 mm | Very high 40 |
| 8 Mar | 32.6 °C | 15 % | 39 km/h | 0.0 mm | Very high 42 |
| 9 Mar | 31.4 °C | 14 % | 35 km/h | 0.0 mm | Very high 40 |
| 10 Mar | 32.7 °C | 14 % | 43 km/h | 0.0 mm | Very high 45 |
| 11 Mar | 33.0 °C | 13 % | 43 km/h | 0.0 mm | Very high 45 |
| 12 Mar | 33.9 °C | 13 % | 38 km/h | 0.0 mm | Very high 45 |
| 13 Mar | 32.7 °C | 14 % | 36 km/h | 0.0 mm | Very high 44 |
| 14 Mar after | 33.1 °C | 17 % | 29 km/h | 0.0 mm | Very high 43 |
| 15 Mar after | 31.7 °C | 18 % | 30 km/h | 0.0 mm | Very high 42 |
| 16 Mar after | 31.8 °C | 17 % | 32 km/h | 0.0 mm | Very high 45 |
| 17 Mar after | 32.0 °C | 17 % | 31 km/h | 0.0 mm | Very high 43 |
| 18 Mar after | 29.8 °C | 23 % | 32 km/h | 0.0 mm | Very high 44 |
| 19 Mar after | 28.5 °C | 34 % | 35 km/h | 0.0 mm | High 33 |
| 20 Mar after | 31.0 °C | 22 % | 40 km/h | 0.0 mm | High 37 |
| 21 Mar after | 32.4 °C | 8 % | 37 km/h | 0.0 mm | Very high 46 |
| 22 Mar after | 32.9 °C | 8 % | 34 km/h | 0.0 mm | Very high 46 |
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 · 152Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 8,828 haYaso5 January 2016 · 17 days · 11 km away
- 11,905 haYaso1 January 2017 · 15 days · 14 km away
- 7,791 haDibat16 January 2020 · 29 days · 15 km away
- 8,143 haDibat29 February 2016 · 15 days · 19 km away
- 8,938 haYaso24 January 2021 · 11 days · 20 km away
- 7,826 haDibat28 February 2020 · 14 days · 28 km away
Frequently asked questions
- How long did the Yaso fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 4 March 2021 to 13 March 2021 (10 days). The perimeter dates it from 6 March 2021 to 12 March 2021.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 5,077 hectares (50.8 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Yaso (5,113 ha, 2.0 %).
- What was the weather like?
- During the fire the temperature reached 33.9 °C, humidity dropped to 13 % and gusts hit 43 km/h. The fire danger index (FWI) reached 45, class Very high.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Ethiopia (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.
Satellite cross-check
History of this page Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
No changes since 24 October 2026.
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
How we know this
- Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
- Dates adjusted with the VIIRS detections inside the perimeter, which said 6 March 2021 to 12 March 2021. 152 Suomi-NPP VIIRS detections on those dates.
- We have not matched this page with any official record.
- Weather: Copernicus ERA5 reanalysis at the fire location, in cells of about 25 km.
- Built-up area and population come from the JRC Global Human Settlement Layer (epoch 2020, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.
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 (Open Data Commons Open Database License 1.0). 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.