Coyuca de Catalán fire, 25 March 2024
Coyuca de Catalán, Ajuchitlán del Progreso
Out · last detection 7 Apr 2024, 09:04 UTC
The fire started on 25 March 2024 in Coyuca de Catalán, Mexico, and satellites saw it burning for 14 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 4,544 hectares from heat detections, spread across 2 municipalities.
It is the 113th largest in Guerrero since 2016 (of 582 with a page). Number 58 in Mexico in 2024, of 289.
The power measured by the satellite is low (23.5 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
matches the official recordwith caveatssatellite onlymodel
When copying, the sentence is
Tick the figures you want: they make up the lede and the CSV.
Burned area
with caveats
4,544ha
Perimeter published by GWIS (Copernicus).
This page4,544CONAFOR3,504
Source
GWIS (Copernicus)
Date
25 Mar 2024 – 7 Apr 2024
+− cross-check
CONAFOR: 3,504 ha (matched records: 2). Difference between the page and the official record: +29.7%. Matched on 8 November 2026. The two figures differ a lot, so these may not be exactly the same fire: take them as nearby records.
Duration by satellite
satellite only
14days
25 Mar 2024 to 7 Apr 2024: first and last day with fire on the page.
Source
GWIS (Copernicus) · NASA FIRMS · VIIRS
Date
last detection: 7 Apr 2024, 09:04 UTC
+− cross-check
Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
Start
satellite only
25 Mar 2024
First day with fire seen by the satellites or the perimeter.
Source
GWIS (Copernicus) · NASA FIRMS · VIIRS
Date
25 Mar 2024
+− cross-check
The two figures differ a lot, so these may not be exactly the same fire: take them as nearby records.
Hotspots
satellite only
228
VIIRS detections at 375 m. Most intense hotspot: 24 MW.
Source
NASA FIRMS · VIIRS (Suomi NPP)
Date
25 Mar 2024 – 7 Apr 2024
+− cross-check
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
The worst day
satellite only
299MW
Total radiative power on 26 March 2024; hotspots that day: 53.
Source
NASA FIRMS · VIIRS (FRP)
Date
26 Mar 2024
+− cross-check
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Danger at the start
model
45.9FWI · very high
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 36.
This is an index computed from weather model data, not a measurement of the fire nor an official warning. Danger warnings are issued by each country’s authority. Emergency number and official warnings ›
Weather during the fire
model
38.4°C · 13% RH
High of 38.4 °C and minimum humidity of 13% on 3 April 2024; gusts of 36 km/h on 4 April 2024.
These are model values for a cell of about 25 km, not from a weather station: they may differ from what was measured on the ground.
ⓘThis page’s change log has been kept since 24 October 2026: every night what it publishes is compared and the difference is logged. Anything earlier is reconstructed from each source’s date and marked as reconstructed.
Show
· reconstructedofficial
Matched with the official CONAFOR record
Nearby records with very different figures: 3,504 ha (records: 2).
A version keeps the area, dates, name and official record; the area as it was logged (changes under 2% are not logged). The map, hotspots and weather always show today’s data.
Citation
A lede of about 60 words figures only, no adjectives
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
38°high
36km/h · peak gust
3%lowest humidity
It had gone 36 days without rain (1 mm or more) when it started.
This area had burned before
91% of the perimeter overlaps earlier fires recorded since 2016: 56 ha in 2017, 2,361 ha in 2018, 1,336 ha in 2019, 1,395 ha in 2020, 2,255 ha in 2021, 1,617 ha in 2022. Part of it burned more than once, so the yearly figures add up to more than the 4,114 ha that had burned before.
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 2025
Built-up area< 0.1ha
Residents< 20
Inside 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.
According to CONAFOR, 2 fires started inside this perimeter on these dates, totalling 3,504 ha (the satellite measured 4,544 ha). The two figures differ a lot, so these may not be exactly the same fire: take them as nearby records.
CONAFOR records each fire that started at a different time or place separately; the satellite sees a single burned area, so this page groups them together. The numbers on the map show where each one started.
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)
It burned an area similar to its twins (4,544 ha against a median of 3,255 ha) and lasted 14 days, against 10 days.
In 14 of 23, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 2.0 mm.
This is a bank of analogues: it shows what usually happens, not what will happen. With fewer than 15 twins we give no figures. How we calculate it
How it ended
—first rain
—no rain in ten days
36km/h · max. gust
It was considered over on 7 Apr, and not even 1 mm fell in the following ten days: it went out without rain. Twins with rain when they ended: 9 of 23, with a median of 2.0 mm.
Weather on this page: Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)
How a twin is chosen
Same area: fires that have already ended, less than 250 km from this one, since 2016.
Same start: we compare the FWI on the first day, the minimum humidity that day and the run of days without rain before it. The slider sets how much they may differ.
Only pages with final weather data (ERA5 reanalysis) calculated in the same way as this fire’s; agricultural and grass burns and pages with data under review are left out.
Fires burning at the same time as this one (a week before or after) are left out: they share the same spell of weather and do not count as a precedent.
They are sorted by similarity, and the outlines of the first five are drawn.
Drag the line to compare the same ground before the fire and after it.
↔
Before · 18 Mar 2024
After · 14 Apr 2024
Sentinel-2 did not pass over on that day. Try another date, or use false colour, which is daily.
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 · Copernicus
On 31 March 2024 the air beside the fire reached 20 µg/m³ of PM2.5. That day averaged 16: 1.1 times the WHO daily guideline (15).
PM2.5 peak20µg/m³
Days over the guideline2days
PM1030µg/m³
Optical depth0.53
WHO 15
23 Mar26 Mar29 Mar1 Apr
GoodFairModeratePoorVery poorExtremely poor
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· 228Every satellite heat detection, one by one, with time, satellite, power and coordinates.›
⬇ Download CSVTimes in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.
According to the heat detections seen by satellite inside the perimeter, it burned from 25 March 2024 to 7 April 2024 (14 days). The perimeter dates it from 25 March 2024 to 31 March 2024.
How much area did it burn?
The perimeter GWIS (Copernicus) rebuilt from heat detections is 4,544 hectares (45.4 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire entered 2 municipalities: Coyuca de Catalán (3,638 ha, 1.1 %); Ajuchitlán del Progreso (935 ha, 0.5 %).
What was the weather like?
During the fire the temperature reached 38.4 °C, humidity dropped to 3 % and gusts hit 36 km/h. The fire danger index (FWI) reached 48, class Very high.
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.
How did the fires that started in similar weather in this area end?
Fires less than 250 km away that started since 2016 with a similar FWI, humidity and dry spell: 23. Their median duration was 10 days and their median area 3,255 ha; 9 % went past 10,000 ha. In 14 of 23, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 2.0 mm.
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.
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 errorHow 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 25 March 2024 to 31 March 2024. 228 Suomi-NPP VIIRS detections on those dates.
Compared with CONAFOR: 3,504 official ha against 4,544 ha of perimeter; similar, but with reservations.
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.
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.