Ajuchitlán del Progreso fire, April 2026 Ajuchitlán del Progreso, Coyuca de Catalán
The fire started on 27 April 2026 in Ajuchitlán del Progreso, Mexico, and satellites saw it burning for 4 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,985 hectares from heat detections, spread across 2 municipalities.
It is the 415th largest in Guerrero since 2016 (of 612 with a page). Number 84 in Mexico in 2026, of 145.
Compare with…
- Burnt area
- 1,985ha
- GWIS perimeter (Copernicus)
- Duration
- 4days
- 27 Apr 2026 – 30 Apr 2026
- Municipalities hit
- 2
- municipalities
- Started on
- 27 Apr
- 2026
- Heat detections
- 73
- in a single hotspot: 70 MW
- Danger at start
- 52
- Extreme · FWI index
- Average daily power
- 182MW
- 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 40 days without rain (1 mm or more) when it started.
This area had burned before
94% of the perimeter overlaps earlier fires recorded since 2016: 39 ha in 2017, 46 ha in 2018, 882 ha in 2019, 1,472 ha in 2020, 183 ha in 2021, 1,661 ha in 2022, 897 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 1,866 ha that had burned before.
- 1,472 ha Coyuca de Catalán fire, April 2020 4,006 ha in total; the hectares shown are those it shares with this fire
- 1,447 ha Ajuchitlán del Progreso fire, May 2022 2,052 ha in total; the hectares shown are those it shares with this fire
- 897 ha Coyuca de Catalán fire, March 2024 4,544 ha in total; the hectares shown are those it shares with this fire
- 882 ha Ajuchitlán del Progreso fire, April 2019 3,601 ha in total; the hectares shown are those it shares with this fire
- 215 ha Coyuca de Catalán fire, April 2022 1,959 ha in total; the hectares shown are those it shares with this fire
- 181 ha Ajuchitlán del Progreso fire, April 2021 2,088 ha in total; the hectares shown are those it shares with this fire
- 46 ha Coyuca de Catalán fire, March 2018 2,936 ha in total; the hectares shown are those it shares with this fire
- 2 ha Coyuca de Catalán fire, March 2021 2,659 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
-
Ajuchitlán del Progreso where it started1,413 ha reached on 27 Apr0.7 %
-
585 ha reached on 28 Apr0.2 %
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 2025Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2025, 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. The GHSL 2025 epoch is a projection made from 2020 and earlier data.
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) |
|---|---|---|---|---|---|
| 27 Apr | 42.2 °C | 10 % | 33 km/h | 0.0 mm | Extreme 52 |
| 28 Apr | 41.8 °C | 16 % | 31 km/h | 0.0 mm | Extreme 51 |
| 29 Apr | 41.5 °C | 13 % | 32 km/h | 0.0 mm | Extreme 53 |
| 30 Apr | 41.0 °C | 15 % | 32 km/h | 0.0 mm | Extreme 54 |
| 1 May after | 40.0 °C | 18 % | 33 km/h | 0.0 mm | Extreme 51 |
| 2 May after | 40.0 °C | 20 % | 35 km/h | 0.0 mm | Very high 50 |
| 3 May after | 38.6 °C | 26 % | 29 km/h | 0.0 mm | Very high 42 |
| 4 May after | 40.3 °C | 22 % | 34 km/h | 0.0 mm | Very high 44 |
| 5 May after | 40.7 °C | 14 % | 33 km/h | 0.0 mm | Very high 45 |
| 6 May after | 41.2 °C | 17 % | 34 km/h | 0.0 mm | Very high 47 |
| 7 May after | 41.1 °C | 17 % | 33 km/h | 0.0 mm | Very high 47 |
| 8 May after | 40.4 °C | 23 % | 31 km/h | 0.0 mm | Very high 44 |
| 9 May after | 37.9 °C | 26 % | 29 km/h | 0.0 mm | Very high 42 |
| 10 May after | 38.7 °C | 23 % | 30 km/h | 0.0 mm | Very high 47 |
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.
The smoke
CAMS · CopernicusOn 29 April 2026 the air beside the fire reached 22 µg/m³ of PM2.5. That day averaged 15: 1.0 times the WHO daily guideline (15).
Particles from the Copernicus CAMS model at the centre of the perimeter; these are not measurements in each town. The pale bar is the worst hour, the solid one the daily average.
Open-Meteo.com (CC BY 4.0) · Copernicus Atmosphere Monitoring Service (CAMS)
Detections table · 73Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 34,994 haAjuchitlán del Progreso30 April 2019 · 29 days · 33 km away
- 15,541 haAjuchitlán del Progreso25 April 2023 · 20 days · 34 km away
- 10,623 haTlalchapaApril 2018 · 19 days · 36 km away
- 14,680 haSan Miguel TotolapanApril 2022 · 27 days · 38 km away
- 43,113 haCoyuca de Catalán29 March 2017 · 46 days · 39 km away
- 12,344 haTlatlayaMay 2020 · 22 days · 40 km away
Frequently asked questions
- How long did the Ajuchitlán del Progreso fire last?
- GWIS (Copernicus) dates it between 27 April 2026 and 30 April 2026: 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 1,985 hectares (19.8 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Ajuchitlán del Progreso (1,413 ha, 0.7 %); Coyuca de Catalán (585 ha, 0.2 %).
- What was the weather like?
- During the fire the temperature reached 42.2 °C, humidity dropped to 10 % and gusts hit 33 km/h. The fire danger index (FWI) reached 54, class Extreme.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Mexico (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: 911 · Emergency number and official warnings ›
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 from the perimeter: the VIIRS detections inside it did not change them. 73 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 2025, 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 ADM2 (Creative Commons Attribution 4.0 (CC BY 4.0)). 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.