The fire started on 24 April 2023 in Mezquitic, Mexico, and satellites saw it burning for 5 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,017 hectares from heat detections, spread across 2 municipalities. According to CONAFOR, it was detected on 24 April 2023 and declared extinguished on 29 April 2023.
It is the 80th largest in Jalisco since 2016 (of 267 with a page). Number 102 in Mexico in 2023, of 285.
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
30.7°C · 13% RH
High of 30.7 °C and minimum humidity of 13% on 27 April 2023; gusts of 60 km/h on 28 April 2023.
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
≈ 40people
Estimated residents inside the perimeter and 0.25 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
Matches: 2,567 ha in the official record (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
31°high
60km/h · peak gust
10%lowest humidity
It had gone 12 days without rain (1 mm or more) when it started.
This area had burned before
96% of the perimeter overlaps earlier fires recorded since 2016: 2,614 ha in 2017, 445 ha in 2019, 1,305 ha in 2021. Part of it burned more than once, so the yearly figures add up to more than the 2,888 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 area0.25ha
Residents≈ 40
Inside the perimeter there were about 0.25 hectares of built-up land and about 40 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.
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 started with an FWI of 57.0, a minimum humidity of 10% and 12 days without rain. Fires in the area that started in weather like this since 2016: 15.
FWI at the start57.0
Minimum humidity10 %
Days without rain12
this firechosen twinsrest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Mezquitic fire, 24 April 2023
3,017 ha5 daysFWI 57.0Min. humidity 10 %
Tepechitlán fire, May 2017
2,235 ha3 daysFWI 59.4Min. humidity 12 %93 km away, in 2017
First rain (1 mm or more) after it ended: 1.6 mm on 26 May.
It burned an area similar to its twins (3,017 ha against a median of 4,373 ha) and lasted 5 days, against 9 days.
In 3 of 15, 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 2.7 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
60km/h · max. gust
It was considered over on 28 Apr, and not even 1 mm fell in the following ten days: it went out without rain. Twins with rain when they ended: 12 of 15, with a median of 2.7 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 · 17 Apr 2023
After · 5 May 2023
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 29 April 2023 the air beside the fire reached 56 µg/m³ of PM2.5. That day averaged 29: 2.0 times the WHO daily guideline (15).
PM2.5 peak56µg/m³
Days over the guideline4days
PM1081µg/m³
Optical depth0.46
WHO 15
22 Apr24 Apr26 Apr28 Apr30 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· 111Every 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 24 April 2023 and 28 April 2023: 5 days between the first and last heat detection of the perimeter. According to CONAFOR, it was detected on 24 April 2023 and declared extinguished on 29 April 2023.
How much area did it burn?
The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,017 hectares (30.2 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire entered 2 municipalities: Bolaños (2,020 ha, 2.3 %); Mezquitic (1,008 ha, 0.3 %).
What was the weather like?
During the fire the temperature reached 30.7 °C, humidity dropped to 10 % and gusts hit 60 km/h. The fire danger index (FWI) reached 58, 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.
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: 15. Their median duration was 9 days and their median area 4,373 ha; 7 % went past 10,000 ha. In 3 of 15, 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 2.7 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 from the perimeter: the VIIRS detections inside it did not change them. 111 Suomi-NPP VIIRS detections on those dates.
Compared with CONAFOR: 2,567 official ha against 3,017 ha of perimeter; they agree within 25%.
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.