Itápolis fire, September 2021 Itápolis, Itajobi, Santa Adélia
The fire started on 21 September 2021 in Itápolis, Brazil, and satellites saw it burning for 3 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 12,115 hectares from heat detections, spread across 3 municipalities.
It is the 9th largest in São Paulo since 2016 (of 97 with a page). Number 123 in Brazil in 2021, of 814.
- Burnt area
- 12,115ha
- GWIS perimeter (Copernicus)
- Duration
- 3days
- 21 Sept 2021 – 23 Sept 2021
- Municipalities hit
- 3
- municipalities
- Started on
- 21 Sept
- 2021
- Heat detections
- 497
- in a single hotspot: 201 MW
- Danger at start
- 68
- Extreme · FWI index
- Energy released
- 10.4GW
- 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 10 days without rain (1 mm or more) when it started. Rain came after the fire: 1.5 mm on 1 Oct.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
10,406 ha reached on 21 Sept10 %
-
Itajobi 16,989 inhabitants1,403 ha reached on 22 Sept2.8 %
-
Santa Adélia 14,018 inhabitants358 ha reached on 22 Sept1.1 %
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.
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) |
|---|---|---|---|---|---|
| 21 Sept | 39.5 °C | 14 % | 59 km/h | 0.0 mm | Extreme 68 |
| 22 Sept | 28.3 °C | 32 % | 53 km/h | 0.0 mm | Very high 48 |
| 23 Sept | 31.4 °C | 28 % | 42 km/h | 0.0 mm | Very high 43 |
| 24 Sept after | 34.4 °C | 27 % | 30 km/h | 0.0 mm | Very high 39 |
| 25 Sept after | 33.7 °C | 26 % | 28 km/h | 0.3 mm | Very high 38 |
| 26 Sept after | 33.3 °C | 31 % | 38 km/h | 0.7 mm | High 36 |
| 27 Sept after | 33.6 °C | 27 % | 23 km/h | 0.0 mm | High 31 |
| 28 Sept after | 35.7 °C | 21 % | 25 km/h | 0.0 mm | Very high 38 |
| 29 Sept after | 35.8 °C | 26 % | 31 km/h | 0.0 mm | Very high 44 |
| 30 Sept after | 34.8 °C | 28 % | 38 km/h | 0.0 mm | Very high 46 |
| 1 Oct after | 36.6 °C | 29 % | 39 km/h | 1.5 mm | High 34 |
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 · 497Every 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 Itápolis fire last?
- GWIS (Copernicus) dates it between 21 September 2021 and 23 September 2021: 3 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 12,115 hectares (121.2 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 3 municipalities: Itápolis (10,406 ha, 10 %); Itajobi (1,403 ha, 2.8 %); Santa Adélia (358 ha, 1.1 %).
- What was the weather like?
- During the fire the temperature reached 39.5 °C, humidity dropped to 14 % and gusts hit 59 km/h. The fire danger index (FWI) reached 68, class Extreme.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Brazil (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: 193
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 3.0 Intergovernmental Organisations (CC BY 3.0 IGO)). 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.