The fire started on 23 May 2024 in Santiago, Mexico, and satellites saw it burning for 6 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,204 hectares from heat detections, spread across 2 municipalities.
It is the 14th largest in Nuevo León since 2016 (of 16 with a page). Number 162 in Mexico in 2024, of 289.
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
2,204ha
Perimeter published by GWIS (Copernicus).
This page2,204CONAFOR1,048
Source
GWIS (Copernicus)
Date
23 May 2024 – 28 May 2024
+− cross-check
CONAFOR: 1,048 ha (matched records: 1). Difference between the page and the official record: +110.4%. Matched on 1 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
6days
23 May 2024 to 28 May 2024: first and last day with fire on the page.
Source
GWIS (Copernicus) · NASA FIRMS · VIIRS
Date
last detection: 28 May 2024, 19:20 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
23 May 2024
First day with fire seen by the satellites or the perimeter.
Source
GWIS (Copernicus) · NASA FIRMS · VIIRS
Date
23 May 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
141
VIIRS detections at 375 m. Most intense hotspot: 123 MW.
Source
NASA FIRMS · VIIRS (Suomi NPP)
Date
23 May 2024 – 28 May 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
861MW
Total radiative power on 24 May 2024; hotspots that day: 39.
Source
NASA FIRMS · VIIRS (FRP)
Date
24 May 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
0.6FWI · very low
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 0.
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
33.0°C · 33% RH
High of 33.0 °C and minimum humidity of 33% on 24 May 2024; gusts of 40 km/h on 28 May 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.
Living inside
model
≈ 100people
Estimated residents inside the perimeter and 3.0 ha of built-up area (100 m grid, epoch 2025).
Source
GHSL R2023A · JRC
Date
calculated on 24 October 2026
+− cross-check
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.
ⓘ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: 1,048 ha (records: 1).
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
33°high
40km/h · peak gust
33%lowest humidity
It had gone 0 days without rain (1 mm or more) when it started. Rain came after the fire: 24.1 mm on 29 May.
This area had burned before
4% of the perimeter overlaps earlier fires recorded since 2016: 72 ha in 2021, 31 ha in 2022. Part of it burned more than once, so the yearly figures add up to more than the 94 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 area3.0ha
Residents≈ 100
Inside the perimeter there were about 3.0 hectares of built-up land and about 100 residents (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, this fire started on 23 May 2024 and burned 1,048 ha (the satellite measured 2,204 ha). The two figures differ a lot, so these may not be exactly the same fire: take them as nearby records.
SantiagoLos Cuartones23 May 20241,048 ha· extinguished on 1 June 2024· cause: natural (lightning)
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)
23 May
31.0 °C
53 %
28 km/h
6.7 mm
Very low 1
24 May
33.0 °C
33 %
31 km/h
0.0 mm
Low 6
25 May
31.6 °C
53 %
38 km/h
0.3 mm
Low 7
26 May
32.6 °C
43 %
37 km/h
1.1 mm
Low 7
27 May
28.9 °C
58 %
36 km/h
6.2 mm
Very low 1
28 May
31.5 °C
52 %
40 km/h
3.7 mm
Very low 1
29 May after
27.7 °C
58 %
40 km/h
24.1 mm
Very low 0
Its twins: fires that started in the same weather
It started with an FWI of 0.6, a minimum humidity of 53% and rain the day before. Fires in the area that started in weather like this since 2017: 3.
FWI at the start0.6
Minimum humidity53 %
Days without rain0
this firechosen twinsrest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Santiago fire, May 2024
2,204 ha6 daysFWI 0.6Min. humidity 53 %
Iturbide fire, July 2018
3,628 ha11 daysFWI 0.7Min. humidity 57 %71 km away, in 2018
First rain (1 mm or more) after it ended: 4.4 mm on 26 Jul.
Fires in the area that started in similar weather: 3. With fewer than 15 we give no figures: they would be more noise than signal.
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
24.1 mmfirst rain
29 Maythe day after it ended
40km/h · max. gust
It was considered over on 28 May, and on 29 May 24.1 mm fell. We do not know whether the rain or the firefighters put it out.
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 2017.
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 · 16 May 2024
After · 4 Jun 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 25 May 2024 the air beside the fire reached 52 µg/m³ of PM2.5. That day averaged 31: 2.1 times the WHO daily guideline (15).
PM2.5 peak52µg/m³
Days over the guideline10days
PM1075µg/m³
Optical depth1.19
WHO 15
21 May24 May27 May30 May
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· 141Every 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.
GWIS (Copernicus) dates it between 23 May 2024 and 28 May 2024: 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 2,204 hectares (22.0 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire entered 2 municipalities: Santiago (1,955 ha, 2.6 %); Santa Catarina (258 ha, 0.3 %).
What was the weather like?
During the fire the temperature reached 33.0 °C, humidity dropped to 33 % and gusts hit 40 km/h. The fire danger index (FWI) reached 7, class Low.
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.
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 from the perimeter: the VIIRS detections inside it did not change them. 141 Suomi-NPP VIIRS detections on those dates.
Compared with CONAFOR: 1,048 official ha against 2,204 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.