Llera fire, March 2021 Llera, Casas
The fire started on 17 March 2021 in Llera, Mexico, and satellites saw it burning for 12 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,202 hectares from heat detections, spread across 2 municipalities.
It is the 17th largest in Tamaulipas since 2016 (of 28 with a page). Number 177 in Mexico in 2021, of 295.
- Burnt area
- 2,202ha
- GWIS perimeter (Copernicus)
- Duration
- 12days
- 17 Mar 2021 – 28 Mar 2021
- Municipalities hit
- 2
- municipalities
- Started on
- 17 Mar
- 2021
- Heat detections
- 110
- in a single hotspot: 34 MW
- Danger at start
- 23
- High · FWI index
- Energy released
- 778MW
- 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: 7.9 mm on 1 Apr.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
Llera where it started1,881 ha reached on 17 Mar0.7 %
-
329 ha reached on 23 Mar0.1 %
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, this fire started on 18 March 2021 and burned 925 ha (the satellite measured 2,202 ha). The two figures differ a lot, so these may not be exactly the same fire: take them as nearby records.
- Llera Ejido El Chijol 18 March 2021 925 ha · extinguished on 3 April 2021 · 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) |
|---|---|---|---|---|---|
| 17 Mar | 30.2 °C | 33 % | 58 km/h | 0.0 mm | High 23 |
| 18 Mar | 23.7 °C | 23 % | 49 km/h | 0.0 mm | High 23 |
| 19 Mar | 22.8 °C | 30 % | 33 km/h | 0.0 mm | Moderate 20 |
| 20 Mar | 21.7 °C | 38 % | 31 km/h | 0.0 mm | Moderate 17 |
| 21 Mar | 22.3 °C | 47 % | 41 km/h | 0.0 mm | Moderate 16 |
| 22 Mar | 25.2 °C | 47 % | 58 km/h | 0.0 mm | Moderate 20 |
| 23 Mar | 28.7 °C | 41 % | 50 km/h | 0.0 mm | Moderate 19 |
| 24 Mar | 31.6 °C | 30 % | 42 km/h | 0.0 mm | High 23 |
| 25 Mar | 26.4 °C | 26 % | 64 km/h | 0.0 mm | High 32 |
| 26 Mar | 28.6 °C | 26 % | 34 km/h | 0.0 mm | High 23 |
| 27 Mar | 29.3 °C | 39 % | 44 km/h | 0.0 mm | High 24 |
| 28 Mar | 23.0 °C | 55 % | 82 km/h | 0.1 mm | High 28 |
| 29 Mar after | 20.9 °C | 51 % | 51 km/h | 0.0 mm | Moderate 19 |
| 30 Mar after | 26.3 °C | 41 % | 53 km/h | 0.0 mm | High 22 |
| 31 Mar after | 28.4 °C | 39 % | 35 km/h | 0.6 mm | Moderate 17 |
| 1 Apr after | 18.9 °C | 73 % | 67 km/h | 7.9 mm | Very low 1 |
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 · 110Every 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 Llera fire last?
- GWIS (Copernicus) dates it between 17 March 2021 and 28 March 2021: 12 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 2,202 hectares (22.0 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Llera (1,881 ha, 0.7 %); Casas (329 ha, 0.1 %).
- What was the weather like?
- During the fire the temperature reached 31.6 °C, humidity dropped to 23 % and gusts hit 82 km/h. The fire danger index (FWI) reached 32, 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.