Ocuilan fire, 11 May 2019 Ocuilan, Miacatlán, Malinalco
The fire started on 11 May 2019 in Ocuilan, Mexico, and satellites saw it burning for 9 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,919 hectares from heat detections, spread across 3 municipalities.
It is the 9th largest in México since 2016 (of 27 with a page). Number 145 in Mexico in 2019, of 364.
- Burnt area
- 2,919ha
- GWIS perimeter (Copernicus)
- Duration
- 9days
- 11 May 2019 – 19 May 2019
- Municipalities hit
- 3
- municipalities
- Started on
- 11 May
- 2019
- Heat detections
- 174
- in a single hotspot: 67 MW
- Danger at start
- 28
- High · FWI index
- Energy released
- 1.5GW
- sum of detected power
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 8 days without rain (1 mm or more) when it started. Rain came after the fire: 5.0 mm on 20 May.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
Ocuilan where it started2,275 ha reached on 11 May5.9 %
-
619 ha reached on 11 May2.9 %
-
40 ha0.2 %
Burnt area inside each municipality, from crossing the GWIS perimeter with administrative boundaries. The distance is from the town centre to the nearest fire: staying a kilometre away does not mean it reached the houses.
Official record
According to CONAFOR, 2 fires started inside this perimeter on these dates, totalling 1,665 ha (the satellite measured 2,919 ha). The two figures differ a lot, so these may not be exactly the same fire: take them as nearby records.
- Ocuilan Comunal Ocuilan 10 May 2019 1,373 ha · extinguished on 17 May 2019 · cause: negligence
- Miacatlán Tlajotla 10 May 2019 292 ha · extinguished on 17 May 2019 · cause: negligence
CONAFOR (Comisión Nacional Forestal), estadística de incendios forestales en datos.gob.mx (CC BY 4.0). This is the agency’s consolidated statistic: it measures the area in its own way, which is why it can differ from the satellite.
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) |
|---|---|---|---|---|---|
| 11 May | 26.9 °C | 26 % | 44 km/h | 0.0 mm | High 28 |
| 12 May | 27.7 °C | 27 % | 43 km/h | 0.0 mm | High 29 |
| 13 May | 27.0 °C | 29 % | 46 km/h | 0.0 mm | High 29 |
| 14 May | 28.8 °C | 23 % | 43 km/h | 0.0 mm | High 29 |
| 15 May | 27.8 °C | 24 % | 42 km/h | 0.0 mm | High 30 |
| 16 May | 26.3 °C | 36 % | 43 km/h | 3.6 mm | Low 5 |
| 17 May | 24.5 °C | 43 % | 38 km/h | 10.6 mm | Very low 1 |
| 18 May | 26.8 °C | 41 % | 30 km/h | 1.1 mm | Very low 4 |
| 19 May | 27.2 °C | 35 % | 33 km/h | 4.0 mm | Very low 3 |
| 20 May after | 27.6 °C | 40 % | 35 km/h | 5.0 mm | Very low 2 |
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 · 174Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
Frequently asked questions
- How long did the Ocuilan fire last?
- GWIS (Copernicus) dates it between 11 May 2019 and 19 May 2019: 9 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 2,919 hectares (29.2 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 3 municipalities: Ocuilan (2,275 ha, 5.9 %); Miacatlán (619 ha, 2.9 %); Malinalco (40 ha, 0.2 %).
- What was the weather like?
- During the fire the temperature reached 28.8 °C, humidity dropped to 23 % and gusts hit 46 km/h. The fire danger index (FWI) reached 30, class 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.
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
Satellite cross-check
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
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.