Caranguejeira fire, September 2016
Caranguejeira, Colmeias e Memória
Out · last detection 6 Sept 2016, 02:50 UTC
The fire started on 5 September 2016 in Caranguejeira, Portugal, and satellites saw it burning for 2 days. Copernicus mapped a burnt perimeter of 348 hectares from satellite imagery, spread across 2 freguesias. According to ICNF, it was detected on 5 September 2016 at 16:45 and declared extinguished on 6 September 2016.
Number 77 in Portugal in 2016, of 180.
The power measured by the satellite is low (3.5 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
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
model
33.2°C · 33% RH
High of 33.2 °C and minimum humidity of 33% on 6 September 2016; gusts of 36 km/h on 5 September 2016.
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.
ⓘ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
· reconstructedofficial
Matched with the official ICNF record
Matches: 405 ha in the official record (records: 1).
A 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
Burnt area inside each freguesia, from crossing the official 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.
What burned
Broadleaved forest79 %
Scrub and transitional woodland18 %
Coniferous forest3.4 %
Land cover inside the perimeter according to Corine Land Cover, as reported by Copernicus.
Official record
According to ICNF, this fire started on 5 September 2016 and burned 405 ha (the satellite measured 348 ha).
LeiriaColmeias5 September 2016 · 16:45405 ha· extinguished on 6 September 2016· cause: negligence
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)
5 Sept
32.9 °C
39 %
36 km/h
0.0 mm
High 31
6 Sept
33.2 °C
33 %
31 km/h
0.0 mm
High 37
7 Sept after
22.9 °C
60 %
44 km/h
0.0 mm
High 25
8 Sept after
22.0 °C
47 %
57 km/h
0.0 mm
High 38
9 Sept after
23.4 °C
49 %
52 km/h
0.0 mm
High 34
10 Sept after
24.8 °C
52 %
47 km/h
0.0 mm
High 30
11 Sept after
25.0 °C
59 %
36 km/h
0.0 mm
High 25
12 Sept after
26.2 °C
52 %
40 km/h
0.0 mm
High 22
13 Sept after
20.9 °C
57 %
51 km/h
16.4 mm
Low 6
Its twins: fires that started in the same weather
It started with an FWI of 30.9, a minimum humidity of 39% and 9 days without rain. Fires in the area that started in weather like this since 2016: 30.
FWI at the start30.9
Minimum humidity39 %
Days without rain9
this firechosen twinsrest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Caranguejeira fire, September 2016
348 ha2 daysFWI 30.9Min. humidity 39 %
Mação fire, July 2017
149 ha1 dayFWI 28.0Min. humidity 40 %58 km away, in 2017
First rain (1 mm or more) after it ended: 1.1 mm on 7 Jul.
It was 1.5 times larger than the median of its twins and lasted 2 days, against 2 days.
Only 9 of its 30 twins burned more. The weather on the first day does not explain everything: the wind in the following days, the fuel and the firefighting also count. In 20 of 30, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 3.4 mm.
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
16.4 mmfirst rain
13 Sept7 days after it ended
36km/h · max. gust
It was considered over on 6 Sept, and on 13 Sept 16.4 mm fell. We do not know whether the rain or the firefighters put it out. Twins with rain when they ended: 10 of 30, with a median of 3.4 mm.
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 2016.
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.
Drag the line to compare the same ground before the fire and after it.
↔
Before · 29 Aug 2016
After · 13 Sept 2016
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 · Copernicus
On 7 September 2016 the air beside the fire reached 62 µg/m³ of PM2.5. That day averaged 34: 2.3 times the WHO daily guideline (15).
PM2.5 peak62µg/m³
Days over the guideline5days
PM1080µg/m³
WHO 15
3 Sept5 Sept7 Sept9 Sept
GoodFairModeratePoorVery poorExtremely 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· 9Every satellite heat detection, one by one, with time, satellite, power and coordinates.›
⬇ Download CSVTimes in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.
Copernicus dates it between 5 September 2016 and 6 September 2016: 2 days between the first and last image with fire. According to ICNF, it was detected on 5 September 2016 at 16:45 and declared extinguished on 6 September 2016.
How much area did it burn?
The perimeter Copernicus measured from satellite imagery is 348 hectares (3.5 km²). Official national figures may differ.
Which freguesias burned?
The fire entered 2 freguesias: Caranguejeira (344 ha, 11 %); Colmeias e Memória (5 ha, 0.1 %).
Did the fire reach a town?
The fire started in Caranguejeira and came within 0.7 km of its centre. That is the distance from the perimeter, or the nearest hotspot, to the point marking the centre; it does not mean it entered the houses.
What was the weather like?
During the fire the temperature reached 33.2 °C, humidity dropped to 33 % and gusts hit 36 km/h. The fire danger index (FWI) reached 37, class High.
Where does this data come from?
From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Portugal (geoBoundaries). It is not an official report.
How did the fires that started in similar weather in this area end?
Fires less than 250 km away that started since 2016 with a similar FWI, humidity and dry spell: 30. Their median duration was 2 days and their median area 225 ha; 20 % went past 1,000 ha. Only 9 of its 30 twins burned more. The weather on the first day does not explain everything: the wind in the following days, the fuel and the firefighting also count. In 20 of 30, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 3.4 mm.
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.
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 errorHow we know this›
Perimeter: EFFIS (Copernicus), mapped on satellite imagery.
Dates from the perimeter: the VIIRS detections inside it did not change them. 9 Suomi-NPP VIIRS detections on those dates.
Compared with ICNF: 405 official ha against 348 ha of perimeter; they agree within 25%.
Weather: Copernicus ERA5 reanalysis at the fire location, in cells of about 25 km.
The perimeter and land cover come from the Copernicus European Forest Fire Information System (EFFIS), measured on MODIS and Sentinel-2 imagery and published under CC BY 4.0. Heat detections come from the VIIRS sensors aboard Suomi-NPP and NOAA-20, distributed by NASA FIRMS at 375 m resolution. Freguesia boundaries come from geoBoundaries ADM3 (CC0 1.0 Universal (CC0 1.0) Public Domain Dedication). The area per freguesia is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ slightly from each country’s official figure.