The fire started on 17 April 2018 in Agua Prieta, Mexico, and satellites saw it burning for 10 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 11,450 hectares from heat detections, spread across 2 municipalities. According to CONAFOR, the largest of the 2 recorded fires was detected on 16 April 2018 and declared extinguished on 27 April 2018.
It is the 11th largest in Sonora since 2016 (of 82 with a page). Number 12 in Mexico in 2018, of 233.
Perimeter published by GWIS (Copernicus).
CONAFOR: 10,560 ha (matched records: 2). Difference between the page and the official record: +8.4%. Matched on 8 November 2026.
17 Apr 2018 to 26 Apr 2018: first and last day with fire on the page.
CONAFOR declared the fire extinguished on 27 April 2018. Satellites may still see smouldering spots afterwards.
Alert according to CONAFOR: 16 April 2018. Official cause: arson.
First day with fire on the page (satellite or perimeter): 17 April 2018.
VIIRS detections at 375 m. Most intense hotspot: 102 MW.
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
Total radiative power on 20 April 2018; hotspots that day: 270.
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 47.
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
High of 29.1 °C and minimum humidity of 10% on 24 April 2018; gusts of 73 km/h on 17 April 2018.
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.
Every night a snapshot of what the page shows is saved. If anything changes, it appears in the list as a log entry.
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.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2018-04-17 | 10 | 189 | 24.2 | 13.6 | 11 | 31.1 | 73.4 | 0 | 101.5 | muy_extremo | 1 |
| 2018-04-18 | 108 | 1,864 | 26.5 | 7.2 | 10 | 17.2 | 45 | 0 | 56 | extremo | 1 |
| 2018-04-19 | 71 | 153 | 28 | 12.4 | 8 | 26.5 | 62.3 | 0 | 65.5 | extremo | 1 |
| 2018-04-20 | 270 | 1,892 | 22.2 | 10.8 | 10 | 28.5 | 67.3 | 0 | 92.6 | muy_extremo | 1 |
| 2018-04-21 | 34 | 264 | 24.4 | 5.5 | 12 | 10.5 | 29.9 | 0 | 49.5 | muy_alto | 1 |
| 2018-04-22 | 0 | 0 | 26.3 | 12.8 | 11 | 16.8 | 41.8 | 0 | 45.3 | muy_alto | 1 |
| 2018-04-23 | 1 | 19 | 28 | 10.9 | 12 | 15.5 | 37.4 | 0 | 49.3 | muy_alto | 1 |
| 2018-04-24 | 30 | 241 | 29.1 | 13.1 | 10 | 17.5 | 41.8 | 0 | 48.6 | muy_alto | 1 |
| 2018-04-25 | 11 | 99 | 28.2 | 15.9 | 14 | 11.7 | 32.4 | 0 | 44 | muy_alto | 1 |
| 2018-04-26 | 1 | 1 | 28.1 | 12.8 | 16 | 15.9 | 39.6 | 0 | 52.8 | extremo | 1 |
| 2018-04-27 | 0 | 0 | 26.1 | 16.2 | 17 | 24.2 | 57.2 | 0.1 | 71.2 | muy_extremo | 0 |
| 2018-04-28 | 0 | 0 | 27.8 | 11.6 | 13 | 19.3 | 45 | 0 | 47.6 | muy_alto | 0 |
| 2018-04-29 | 0 | 0 | 26.9 | 12.3 | 15 | 23.2 | 57.6 | 0 | 69.6 | extremo | 0 |
| 2018-04-30 | 0 | 0 | 24.5 | 14.1 | 16 | 28.8 | 68.8 | 0 | 84.7 | muy_extremo | 0 |
| 2018-05-01 | 0 | 0 | 23.3 | 12.1 | 16 | 31.6 | 74.2 | 0 | 93.1 | muy_extremo | 0 |
| 2018-05-02 | 0 | 0 | 19.8 | 10.3 | 25 | 37.2 | 91.1 | 0.6 | 85 | muy_extremo | 0 |
| 2018-05-03 | 0 | 0 | 22.5 | 5.5 | 10 | 19.6 | 45.4 | 0 | 50.3 | extremo | 0 |
| 2018-05-04 | 0 | 0 | 25.5 | 7.7 | 9 | 16.2 | 41.8 | 0 | 56.8 | extremo | 0 |
| 2018-05-05 | 0 | 0 | 28.6 | 11 | 13 | 24.3 | 58.7 | 0 | 70 | muy_extremo | 0 |
| 2018-05-06 | 0 | 0 | 31.8 | 13.5 | 11 | 10 | 29.9 | 0 | 46.5 | muy_alto | 0 |
It is generated in your browser from this page’s data: one file per fire, aggregated by day and without individual hotspots.
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), CONAFOR, ERA5 (ECMWF/Copernicus C3S) · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
It had gone 47 days without rain (1 mm or more) when it started.
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
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.
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.
Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2020, 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.
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
According to CONAFOR, 2 fires started inside this perimeter on these dates, totalling 10,560 ha (the satellite measured 11,450 ha).
CONAFOR records each fire that started at a different time or place separately; the satellite sees a single burned area, so this page groups them together. The numbers on the map show where each one started.
Total according to CONAFOR: 10,560 ha, 92 % of the 11,450 ha in the satellite perimeter.
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.
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 Strong wind: 19 % of the area in Mexico Very dry air: 21 % of the area in Mexico
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 17 Apr | 24.2 °C | 11 % | 73 km/h | 0.0 mm | Very extreme 102 |
| 18 Apr | 26.5 °C | 10 % | 45 km/h | 0.0 mm | Extreme 56 |
| 19 Apr | 28.0 °C | 8 % | 62 km/h | 0.0 mm | Extreme 66 |
| 20 Apr | 22.2 °C | 10 % | 67 km/h | 0.0 mm | Very extreme 93 |
| 21 Apr | 24.4 °C | 12 % | 30 km/h | 0.0 mm | Very high 50 |
| 22 Apr | 26.3 °C | 11 % | 42 km/h | 0.0 mm | Very high 45 |
| 23 Apr | 28.0 °C | 12 % | 37 km/h | 0.0 mm | Very high 49 |
| 24 Apr | 29.1 °C | 10 % | 42 km/h | 0.0 mm | Very high 49 |
| 25 Apr | 28.2 °C | 14 % | 32 km/h | 0.0 mm | Very high 44 |
| 26 Apr | 28.1 °C | 16 % | 40 km/h | 0.0 mm | Extreme 53 |
| 27 Apr after | 26.1 °C | 17 % | 57 km/h | 0.1 mm | Very extreme 71 |
| 28 Apr after | 27.8 °C | 13 % | 45 km/h | 0.0 mm | Very high 48 |
| 29 Apr after | 26.9 °C | 15 % | 58 km/h | 0.0 mm | Extreme 70 |
| 30 Apr after | 24.5 °C | 16 % | 69 km/h | 0.0 mm | Very extreme 85 |
| 1 May after | 23.3 °C | 16 % | 74 km/h | 0.0 mm | Very extreme 93 |
| 2 May after | 19.8 °C | 25 % | 91 km/h | 0.6 mm | Very extreme 85 |
| 3 May after | 22.5 °C | 10 % | 45 km/h | 0.0 mm | Extreme 50 |
| 4 May after | 25.5 °C | 9 % | 42 km/h | 0.0 mm | Extreme 57 |
| 5 May after | 28.6 °C | 13 % | 59 km/h | 0.0 mm | Very extreme 70 |
| 6 May after | 31.8 °C | 11 % | 30 km/h | 0.0 mm | Very high 46 |
It started with an FWI of 101.5, a minimum humidity of 11% and 47 days without rain. Fires in the area that started in weather like this since 2016: 7.
First rain (1 mm or more) after it ended: none in the following ten days.
First rain (1 mm or more) after it ended: 1.8 mm on 1 Jul.
First rain (1 mm or more) after it ended: none in the following ten days.
First rain (1 mm or more) after it ended: none in the following ten days.
First rain (1 mm or more) after it ended: 3.5 mm on 24 Jun.
Fires in the area that started in similar weather: 7. 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
It was considered over on 26 Apr, 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)
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.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
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 · Emergency number and official warnings
Satellite cross-check
No changes since 24 October 2026.
RSS Changes to this page With cross-checks and a citable version
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.
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.