Burned area
satellite only4,866ha
Perimeter published by GWIS (Copernicus).
- Source
- GWIS (Copernicus)
- Date
- 21 Oct 2024 – 6 Nov 2024
+− cross-check
No official record is matched to this page to compare it with.
BR · Brazil · –
Bocaina fire, October 2024 Bocaina, Sussuapara, Santo Antônio de Lisboa
Out · last detection 6 Nov 2024, 15:33 UTC
The fire started on 21 October 2024 in Bocaina, Brazil, and satellites saw it burning for 17 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 4,866 hectares from heat detections, spread across 3 municipalities.
It is the 312th largest in Piaui since 2016 (of 665 with a page). Number 707 in Brazil in 2024, of 1301.
Use this data
Compare with…
Use this data
Fire page data · version 2026-11-05matches the official recordwith caveatssatellite onlymodel
When copying, the sentence is
Tick the figures you want: they make up the lede and the CSV.
Duration by satellite
satellite only17days
21 Oct 2024 to 6 Nov 2024: first and last day with fire on the page.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- last detection: 6 Nov 2024, 15:33 UTC
+− cross-check
Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
Start
satellite only21 Oct 2024
First day with fire seen by the satellites or the perimeter.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 21 Oct 2024
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only145
VIIRS detections at 375 m. Most intense hotspot: 114 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP + NOAA-20)
- Date
- 21 Oct 2024 – 6 Nov 2024
+− cross-check
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
The worst day
satellite only1,221MW
Total radiative power on 27 October 2024; hotspots that day: 46.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 27 Oct 2024
+− cross-check
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Danger at the start
model56.2FWI · extreme
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 60.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 21 Oct 2024, local noon
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
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
model40.2°C · 14% RH
High of 40.2 °C and minimum humidity of 14% on 27 October 2024; gusts of 49 km/h on 21 October 2024.
- Source
- weather model at the fire’s grid cell
- Date
- 21 Oct 2024 – 6 Nov 2024
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
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≈ 2,500people
Estimated residents inside the perimeter and 19 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
-
logLast day with fire: 1 November 2024 → 6 November 2024.
-
· reconstructed weatherWeather and FWI computed from the ERA5 reanalysis
-
· reconstructed GHSLPopulation and built-up area computed
What was saved on 5 November 2026
Every night a snapshot of what the page shows is saved. If anything changes, it appears in the list as a log entry.
- Area
- 4,866 ha
- Dates
- 21 Oct 2024 – 6 Nov 2024
- Name
- Bocaina
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/bocaina-piaui-2024-10?v=2026-11-05A 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
CSV for this fire bocaina-piaui-2024-10.csv · daily, no individual hotspots
| fecha | focos_viirs | frp_mw | tmax_c | tmin_c | hr_min_pct | viento_max_kmh | racha_max_kmh | precip_mm | fwi | clase_fwi | dentro_del_incendio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024-10-21 | 3 | 30 | 37.2 | 24.9 | 27 | 25.4 | 49 | 0 | 56.2 | extremo | 1 |
| 2024-10-22 | 5 | 57 | 38.8 | 25.1 | 21 | 18.2 | 40.3 | 0 | 58.8 | extremo | 1 |
| 2024-10-23 | 5 | 103 | 38.4 | 26 | 20 | 19.4 | 40 | 0 | 54.2 | extremo | 1 |
| 2024-10-24 | 1 | 4 | 38.7 | 25.1 | 22 | 17.8 | 38.5 | 0 | 49.5 | muy_alto | 1 |
| 2024-10-25 | 4 | 29 | 38.9 | 24.8 | 25 | 21.2 | 41 | 0 | 53.2 | extremo | 1 |
| 2024-10-26 | 7 | 44 | 39.8 | 24.4 | 19 | 23.4 | 44.3 | 0 | 57.3 | extremo | 1 |
| 2024-10-27 | 46 | 1,221 | 40.2 | 24 | 14 | 20.6 | 39.2 | 0 | 72.7 | muy_extremo | 1 |
| 2024-10-28 | 16 | 120 | 38.6 | 25.5 | 20 | 20.3 | 40.7 | 0 | 69.8 | extremo | 1 |
| 2024-10-29 | 30 | 418 | 38.6 | 26.2 | 16 | 23.2 | 46.4 | 0 | 73.3 | muy_extremo | 1 |
| 2024-10-30 | 17 | 88 | 39.4 | 25.3 | 19 | 18.5 | 37.8 | 0 | 48.1 | muy_alto | 1 |
| 2024-10-31 | 3 | 58 | 37.5 | 25.6 | 26 | 19 | 36.7 | 0 | 56.3 | extremo | 1 |
| 2024-11-01 | 1 | 6 | 38.3 | 25.7 | 29 | 18.4 | 36 | 0.3 | 49.5 | muy_alto | 1 |
| 2024-11-02 | 0 | 0 | 38.9 | 26.4 | 24 | 20.6 | 37.8 | 0 | 60.9 | extremo | 1 |
| 2024-11-03 | 1 | 10 | 38.7 | 26 | 21 | 21 | 43.9 | 0 | 59.4 | extremo | 1 |
| 2024-11-04 | 3 | 4 | 38.9 | 24.9 | 22 | 23.2 | 46.8 | 0 | 64.5 | extremo | 1 |
| 2024-11-05 | 2 | 19 | 38.1 | 26.5 | 23 | 16 | 34.9 | 0 | 47.3 | muy_alto | 1 |
| 2024-11-06 | 1 | 10 | 38.8 | 27.8 | 23 | 17.7 | 36.7 | 0 | 50 | extremo | 1 |
| 2024-11-07 | 0 | 0 | 37.8 | 25.7 | 29 | 19.6 | 38.9 | 0 | 49.5 | muy_alto | 0 |
| 2024-11-08 | 0 | 0 | 39.4 | 25.1 | 24 | 20.6 | 40 | 0 | 53 | extremo | 0 |
| 2024-11-09 | 0 | 0 | 38.4 | 25.3 | 27 | 20.8 | 40.7 | 0 | 54.6 | extremo | 0 |
| 2024-11-10 | 0 | 0 | 39.2 | 25.7 | 24 | 21.9 | 43.2 | 0 | 50.8 | extremo | 0 |
| 2024-11-11 | 0 | 0 | 35.8 | 25.5 | 34 | 19.1 | 36.7 | 0.3 | 35.8 | alto | 0 |
| 2024-11-12 | 0 | 0 | 32.6 | 25.6 | 39 | 11.5 | 23.4 | 0.2 | 29.8 | alto | 0 |
| 2024-11-13 | 0 | 0 | 36.7 | 26.1 | 32 | 18.5 | 39.2 | 0.1 | 47.4 | muy_alto | 0 |
| 2024-11-14 | 0 | 0 | 37.5 | 25.6 | 27 | 19.8 | 38.2 | 0 | 51.6 | extremo | 0 |
| 2024-11-15 | 0 | 0 | 38.2 | 24.1 | 22 | 17.9 | 38.5 | 0 | 51.9 | extremo | 0 |
| 2024-11-16 | 0 | 0 | 37.9 | 25 | 23 | 19.5 | 39.2 | 0 | 58 | extremo | 0 |
It is generated in your browser from this page’s data: one file per fire, aggregated by day and without individual hotspots.
Live widget for your story
It updates itself while the fire is still active and links to this page. Free, with the attribution shown at the bottom.
Sources for this page: GWIS (Copernicus), NASA FIRMS (VIIRS), ERA5 (ECMWF/Copernicus C3S) · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
- Burnt area
- 4,866ha
- GWIS perimeter (Copernicus)
- Duration
- 17days
- 21 Oct 2024 – 6 Nov 2024
- Municipalities hit
- 3
- municipalities
- Started on
- 21 Oct
- 2024
- Heat detections
- 145
- in a single hotspot: 114 MW
- Danger at start
- 56
- Extreme · FWI index
- Average daily power
- 139MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
21 Oct6 Nov
6 Nov 2024
How it evolved, day by day
21 Oct
27 Oct
3 Nov
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
40°high
49km/h · peak gust
14%lowest humidity
It had gone more than two months without rain (1 mm or more) when it started.
This area had burned before
58% of the perimeter overlaps earlier fires recorded since 2016: 300 ha in 2019, 2,377 ha in 2020, 279 ha in 2021.
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
-
2,400 ha reached on 22 Oct9.2 %
-
Sussuapara 6,220 inhabitants1,908 ha reached on 22 Oct9.2 %
-
590 ha reached on 21 Oct1.5 %
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 2025Built-up area19 ha
Residents≈ 2,500
Inside the perimeter there were about 19 hectares of built-up land and about 2,500 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.
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)
Started with 60 days without rain: 55 % of the area in Brazil
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 21 Oct | 37.2 °C | 27 % | 49 km/h | 0.0 mm | Extreme 56 |
| 22 Oct | 38.8 °C | 21 % | 40 km/h | 0.0 mm | Extreme 59 |
| 23 Oct | 38.4 °C | 20 % | 40 km/h | 0.0 mm | Extreme 54 |
| 24 Oct | 38.7 °C | 22 % | 38 km/h | 0.0 mm | Very high 50 |
| 25 Oct | 38.9 °C | 25 % | 41 km/h | 0.0 mm | Extreme 53 |
| 26 Oct | 39.8 °C | 19 % | 44 km/h | 0.0 mm | Extreme 57 |
| 27 Oct | 40.2 °C | 14 % | 39 km/h | 0.0 mm | Very extreme 73 |
| 28 Oct | 38.6 °C | 20 % | 41 km/h | 0.0 mm | Extreme 70 |
| 29 Oct | 38.6 °C | 16 % | 46 km/h | 0.0 mm | Very extreme 73 |
| 30 Oct | 39.4 °C | 19 % | 38 km/h | 0.0 mm | Very high 48 |
| 31 Oct | 37.5 °C | 26 % | 37 km/h | 0.0 mm | Extreme 56 |
| 1 Nov | 38.3 °C | 29 % | 36 km/h | 0.3 mm | Very high 50 |
| 2 Nov | 38.9 °C | 24 % | 38 km/h | 0.0 mm | Extreme 61 |
| 3 Nov | 38.7 °C | 21 % | 44 km/h | 0.0 mm | Extreme 59 |
| 4 Nov | 38.9 °C | 22 % | 47 km/h | 0.0 mm | Extreme 64 |
| 5 Nov | 38.1 °C | 23 % | 35 km/h | 0.0 mm | Very high 47 |
| 6 Nov | 38.8 °C | 23 % | 37 km/h | 0.0 mm | Extreme 50 |
| 7 Nov after | 37.8 °C | 29 % | 39 km/h | 0.0 mm | Very high 50 |
| 8 Nov after | 39.4 °C | 24 % | 40 km/h | 0.0 mm | Extreme 53 |
| 9 Nov after | 38.4 °C | 27 % | 41 km/h | 0.0 mm | Extreme 55 |
| 10 Nov after | 39.2 °C | 24 % | 43 km/h | 0.0 mm | Extreme 51 |
| 11 Nov after | 35.8 °C | 34 % | 37 km/h | 0.3 mm | High 36 |
| 12 Nov after | 32.6 °C | 39 % | 23 km/h | 0.2 mm | High 30 |
| 13 Nov after | 36.7 °C | 32 % | 39 km/h | 0.1 mm | Very high 47 |
| 14 Nov after | 37.5 °C | 27 % | 38 km/h | 0.0 mm | Extreme 52 |
| 15 Nov after | 38.2 °C | 22 % | 38 km/h | 0.0 mm | Extreme 52 |
| 16 Nov after | 37.9 °C | 23 % | 39 km/h | 0.0 mm | Extreme 58 |
Its twins: fires that started in the same weather
It started with an FWI of 56.2, a minimum humidity of 27% and more than two months without rain. Fires in the area that started in weather like this since 2024: 2.
FWI at the start
56.2
Minimum humidity
27 %
Days without rain
60+
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Bocaina fire, October 2024
4,866 ha
17 days
FWI 56.2
Min. humidity 27 %
Nazaré do Piauí fire, September 2024
4,939 ha
18 days
FWI 59.6
Min. humidity 25 %
170 km away, in 2024
First rain (1 mm or more) after it ended: none in the following ten days.
Ribeira do Piauí fire, September 2024
3,658 ha
14 days
FWI 59.7
Min. humidity 23 %
188 km away, in 2024
First rain (1 mm or more) after it ended: none in the following ten days.
What happened to them
Fires in the area that started in similar weather: 2. With fewer than 15 we give no figures: they would be more noise than signal.
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
49km/h · max. gust
It was considered over on 6 Nov, and not even 1 mm fell in the following ten days: it went out without rain.
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 2024.
- 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.
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 14 Oct 2024
After · 13 Nov 2024
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 · CopernicusOn 19 October 2024 the air beside the fire reached 20 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).
PM2.5 peak20 µg/m³
Days over the guideline0 days
PM1029 µg/m³
Optical depth0.60
WHO 15
19 Oct23 Oct27 Oct31 Oct4 Nov
Good
Fair
Moderate
Poor
Very poor
Extremely 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 · 145Every satellite heat detection, one by one, with time, satellite, power and coordinates.
⬇ Download CSV
Times in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 4,875 haSussuaparaSeptember 2019 · 12 days · 6 km away
- 6,433 haGeminianoOctober 2020 · 14 days · 25 km away
- 8,015 haSão Luís do PiauíJuly 2021 · 28 days · 29 km away
- 6,514 haPicosSeptember 2019 · 12 days · 31 km away
- 5,119 haAroeiras do ItaimOctober 2019 · 12 days · 33 km away
- 11,422 haPio IXSeptember 2019 · 28 days · 39 km away
Frequently asked questions
- How long did the Bocaina fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 21 October 2024 to 6 November 2024 (17 days). The perimeter dates it from 21 October 2024 to 1 November 2024.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 4,866 hectares (48.7 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 3 municipalities: Bocaina (2,400 ha, 9.2 %); Sussuapara (1,908 ha, 9.2 %); Santo Antônio de Lisboa (590 ha, 1.5 %).
- What was the weather like?
- During the fire the temperature reached 40.2 °C, humidity dropped to 14 % and gusts hit 49 km/h. The fire danger index (FWI) reached 73, class Very 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 · Emergency number and official warnings
Satellite cross-check
History of this page · 1 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Last day with fire: 1 November 2024 → 6 November 2024.
RSS Changes to this page With cross-checks and a citable version
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 21 October 2024 to 1 November 2024. 145 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 2025, 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 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.