Burned area
satellite only3,931ha
Perimeter published by EFFIS (Copernicus).
- Source
- EFFIS (Copernicus)
- Date
- perimeter revised on 20 July 2023
+− cross-check
No official record is matched to this page to compare it with.
EL · Greece · –
Lavreotiki fire, July 2023 Λαυρεωτικής · Saronikos, Lavreotiki
Out · last detection 18 Jul 2023, 11:03 UTC
The fire started on 17 July 2023 in Lavreotiki, Greece, and satellites saw it burning for 2 days. Copernicus mapped a burnt perimeter of 3,931 hectares from satellite imagery, spread across 2 municipalities.
It is the 8th largest in Attica since 2016 (of 32 with a page). Number 7 in Greece in 2023, of 34.
Use this data
Compare with…
Use this data
Fire page data · version 2026-10-24matches 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 only2days
17 Jul 2023 to 18 Jul 2023: first and last day with fire on the page.
- Source
- EFFIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- last detection: 18 Jul 2023, 11:03 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 only17 Jul 2023
First day with fire seen by the satellites or the perimeter.
- Source
- EFFIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 17 Jul 2023
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only108
VIIRS detections at 375 m. Most intense hotspot: 216 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP)
- Date
- 17 Jul 2023 – 18 Jul 2023
+− 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 only5,296MW
Total radiative power on 17 July 2023; hotspots that day: 96.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 17 Jul 2023
+− 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
model94.2FWI · very extreme
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 17.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 17 Jul 2023, 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
model35.5°C · 27% RH
High of 35.5 °C and minimum humidity of 27% on 18 July 2023; gusts of 68 km/h on 17 July 2023.
- Source
- weather model at the fire’s grid cell
- Date
- 17 Jul 2023 – 18 Jul 2023
- 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≈ 1,600people
Estimated residents inside the perimeter and 42 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
-
· reconstructed weatherWeather and FWI computed from the ERA5 reanalysis
-
· reconstructed GHSLPopulation and built-up area computed
-
· reconstructed perimeterEFFIS (Copernicus) revises the perimeter
What was saved on 24 October 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
- 3,931 ha
- Dates
- 17 Jul 2023 – 18 Jul 2023
- Name
- Lavreotiki
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/lavreotiki-2023-07?v=2026-10-24A 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 lavreotiki-2023-07.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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023-07-17 | 96 | 5,296 | 35.2 | 27.2 | 22 | 30.1 | 67.7 | 0 | 94.2 | muy_extremo | 1 |
| 2023-07-18 | 12 | 43 | 35.5 | 27.1 | 27 | 28 | 64.4 | 0 | 86.9 | muy_extremo | 1 |
| 2023-07-19 | 0 | 0 | 36.9 | 28.7 | 25 | 26.1 | 60.8 | 0 | 71.2 | muy_extremo | 0 |
| 2023-07-20 | 0 | 0 | 38.9 | 27.1 | 21 | 14.1 | 36.4 | 0 | 52.9 | extremo | 0 |
| 2023-07-21 | 0 | 0 | 38.2 | 24.7 | 26 | 11.1 | 30.6 | 0 | 54.2 | extremo | 0 |
| 2023-07-22 | 0 | 0 | 39 | 24.5 | 25 | 10.6 | 28.8 | 0 | 43.8 | muy_alto | 0 |
| 2023-07-23 | 0 | 0 | 42.4 | 24.1 | 15 | 9.4 | 30.6 | 0 | 61.8 | extremo | 0 |
| 2023-07-24 | 0 | 0 | 36.1 | 26.9 | 29 | 16.3 | 40.7 | 0 | 55.1 | extremo | 0 |
| 2023-07-25 | 0 | 0 | 37.7 | 23 | 25 | 11.6 | 30.6 | 0 | 44.9 | muy_alto | 0 |
| 2023-07-26 | 0 | 0 | 43.2 | 22.3 | 16 | 16.7 | 50 | 0 | 55.8 | extremo | 0 |
| 2023-07-27 | 0 | 0 | 36.5 | 26.2 | 20 | 17.9 | 45.4 | 0 | 65.6 | extremo | 0 |
| 2023-07-28 | 0 | 0 | 31.3 | 23.8 | 32 | 15 | 34.6 | 0 | 50.4 | 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: EFFIS (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
- 3,931ha
- Copernicus perimeter
- Duration
- 2days
- 17 Jul 2023 – 18 Jul 2023
- Municipalities hit
- 2
- municipalities
- Started on
- 17 Jul
- 2023
- Heat detections
- 108
- in a single hotspot: 216 MW
- Danger at start
- 94
- Very extreme · FWI index
- Average daily power
- 2.7GW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
17 Jul18 Jul
18 Jul 2023
How it evolved, day by day
17 Jul
18 Jul
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
36°high
68km/h · peak gust
22%lowest humidity
It had gone 17 days without rain (1 mm or more) when it started.
This area had burned before
30% of the perimeter overlaps earlier fires recorded since 2016: 474 ha in 2017, 697 ha in 2020, 41 ha in 2022.
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Athens boundary: geoBoundaries · geoBoundaries, Wikimedia Commons (CC0 1.0).
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).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each town
-
2,766 ha reached on 17 Jul23 %
-
1,172 ha reached on 17 Jul6.8 %
Burnt area inside each municipality, 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
- Other natural land34 %
- Sclerophyllous scrub33 %
- Agricultural areas24 %
- Artificial surfaces6.7 %
- Coniferous forest3.2 %
Land cover inside the perimeter according to Corine Land Cover, as reported by Copernicus.
People and buildings inside the perimeter
GHSL 2025Built-up area42 ha
Residents≈ 1,600
Inside the perimeter there were about 42 hectares of built-up land and about 1,600 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 Extreme FWI: 64 % of the area in Greece Strong wind: 51 % of the area in Greece
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 17 Jul | 35.2 °C | 22 % | 68 km/h | 0.0 mm | Very extreme 94 |
| 18 Jul | 35.5 °C | 27 % | 64 km/h | 0.0 mm | Very extreme 87 |
| 19 Jul after | 36.9 °C | 25 % | 61 km/h | 0.0 mm | Very extreme 71 |
| 20 Jul after | 38.9 °C | 21 % | 36 km/h | 0.0 mm | Extreme 53 |
| 21 Jul after | 38.2 °C | 26 % | 31 km/h | 0.0 mm | Extreme 54 |
| 22 Jul after | 39.0 °C | 25 % | 29 km/h | 0.0 mm | Very high 44 |
| 23 Jul after | 42.4 °C | 15 % | 31 km/h | 0.0 mm | Extreme 62 |
| 24 Jul after | 36.1 °C | 29 % | 41 km/h | 0.0 mm | Extreme 55 |
| 25 Jul after | 37.7 °C | 25 % | 31 km/h | 0.0 mm | Very high 45 |
| 26 Jul after | 43.2 °C | 16 % | 50 km/h | 0.0 mm | Extreme 56 |
| 27 Jul after | 36.5 °C | 20 % | 45 km/h | 0.0 mm | Extreme 66 |
| 28 Jul after | 31.3 °C | 32 % | 35 km/h | 0.0 mm | Extreme 50 |
Its twins: fires that started in the same weather
It started with an FWI of 94.2, a minimum humidity of 22% and 17 days without rain. Fires in the area that started in weather like this since 2016: 3.
FWI at the start
94.2
Minimum humidity
22 %
Days without rain
17
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Lavreotiki fire, July 2023
3,931 ha
2 days
FWI 94.2
Min. humidity 22 %
Monemvasia fire, July 2025
313 ha
2 days
FWI 85.2
Min. humidity 21 %
141 km away, in 2025
First rain (1 mm or more) after it ended: 1.2 mm on 6 Aug.
Aspropyrgos fire, August 2023
6,057 ha
7 days
FWI 89.0
Min. humidity 20 %
44 km away, in 2023
First rain (1 mm or more) after it ended: 1.4 mm on 4 Sept.
Mandra-Eidyllia fire, July 2022
156 ha
1 day
FWI 75.3
Min. humidity 21 %
73 km away, in 2022
First rain (1 mm or more) after it ended: 11.3 mm on 9 Jul.
What happened to them
Fires in the area that started in similar weather: 3. 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
68km/h · max. gust
It was considered over on 18 Jul, 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 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.
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 10 Jul 2023
After · 25 Jul 2023
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 20 July 2023 the air beside the fire reached 46 µg/m³ of PM2.5. That day averaged 29: 1.9 times the WHO daily guideline (15).
PM2.5 peak46 µg/m³
Days over the guideline4 days
PM1043 µg/m³
Optical depth0.45
WHO 15
15 Jul17 Jul19 Jul21 Jul
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 · 108Every 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
- 1,038 haLavreotiki ΛαυρεωτικήςSeptember 2020 · 1 day · 3 km away
- 1,901 haLavreotiki ΛαυρεωτικήςAugust 2025 · 3 days · 8 km away
- 2,836 haRafina-Pikermi Ραφήνα-ΠικέρμιJuly 2022 · 2 days · 28 km away
- 1,362 haMarathon ΜαραθώναςJuly 2018 · 2 days · 28 km away
- 10,971 haVarnavas ΜαραθώναςAugust 2024 · 8 days · 38 km away
Frequently asked questions
- How long did the Lavreotiki fire last?
- Copernicus dates it between 17 July 2023 and 18 July 2023: 2 days between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 3,931 hectares (39.3 km²). Official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Saronikos (2,766 ha, 23 %); Lavreotiki (1,172 ha, 6.8 %).
- What was the weather like?
- During the fire the temperature reached 35.5 °C, humidity dropped to 22 % and gusts hit 68 km/h. The fire danger index (FWI) reached 94, class Very extreme.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Greece (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: 112 · 199 · Emergency number and official warnings
Satellite cross-check
History of this page Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
No changes since 24 October 2026.
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: EFFIS (Copernicus), mapped on satellite imagery.
- Dates from the perimeter: the VIIRS detections inside it did not change them. 108 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 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. Municipal boundaries come from geoBoundaries ADM3 (CC0 1.0 Universal (CC0 1.0) Public Domain Dedication). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ slightly from each country’s official figure.