Santiago Ixcuintepec fire, 11 May 2019 Santiago Ixcuintepec, San Juan Mazatlán, San Lucas Camotlán
The fire started on 11 May 2019 in Santiago Ixcuintepec, Mexico, and satellites saw it burning for 18 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,705 hectares from heat detections, spread across 3 municipalities.
It is the 162th largest in Oaxaca since 2016 (of 204 with a page). Number 312 in Mexico in 2019, of 364.
Compare with…
- Burnt area
- 1,705ha
- GWIS perimeter (Copernicus)
- Duration
- 18days
- 11 May 2019 – 28 May 2019
- Municipalities hit
- 3
- municipalities
- Started on
- 11 May
- 2019
- Heat detections
- 100
- in a single hotspot: 93 MW
- Danger at start
- 12
- Moderate · FWI index
- Average daily power
- 48MW
- 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 0 days without rain (1 mm or more) when it started. Rain came after the fire: 3.7 mm on 24 May.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
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
-
Santiago Ixcuintepec where it started1,269 ha reached on 11 May10 %
-
362 ha reached on 11 May0.2 %
-
83 ha reached on 11 May0.8 %
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 was no noticeable built-up land and almost nobody lived there (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) |
|---|---|---|---|---|---|
| 18 May | 36.5 °C | 49 % | 49 km/h | 0.3 mm | Moderate 12 |
| 19 May | 36.4 °C | 43 % | 41 km/h | 0.0 mm | Moderate 17 |
| 20 May | 35.2 °C | 47 % | 30 km/h | 0.3 mm | Moderate 15 |
| 21 May | 36.7 °C | 49 % | 55 km/h | 0.0 mm | Moderate 21 |
| 22 May | 36.0 °C | 49 % | 45 km/h | 0.0 mm | Moderate 20 |
| 23 May | 33.6 °C | 54 % | 34 km/h | 1.5 mm | Low 10 |
| 24 May | 32.6 °C | 63 % | 50 km/h | 3.7 mm | Very low 4 |
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 · 100Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 3,448 haSan Juan Mazatlán2 May 2019 · 12 days · 12 km away
- 4,856 haSan Juan Mazatlán23 April 2019 · 30 days · 18 km away
- 3,347 haGuevea de Humboldt27 April 2017 · 8 days · 18 km away
- 8,701 haGuevea de HumboldtApril 2019 · 25 days · 24 km away
- 7,768 haGuevea de HumboldtMay 2024 · 21 days · 24 km away
- 6,474 haSan Carlos YautepecApril 2023 · 28 days · 27 km away
Frequently asked questions
- How long did the Santiago Ixcuintepec fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 11 May 2019 to 28 May 2019 (18 days). The perimeter dates it from 18 May 2019 to 23 May 2019.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 1,705 hectares (17.0 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 3 municipalities: Santiago Ixcuintepec (1,269 ha, 10 %); San Juan Mazatlán (362 ha, 0.2 %); San Lucas Camotlán (83 ha, 0.8 %).
- What was the weather like?
- During the fire the temperature reached 36.7 °C, humidity dropped to 43 % and gusts hit 55 km/h. The fire danger index (FWI) reached 21, class Moderate.
- 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 · 2 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Last day with fire: 23 May 2019 → 28 May 2019.
- Start date: 18 May 2019 → 11 May 2019.
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 18 May 2019 to 23 May 2019. 100 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 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.