How long did the Del Nayar fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 15 April 2019 to 9 May 2019 (25 days). The perimeter dates it from 15 April 2019 to 6 May 2019. According to CONAFOR, the largest of the 2 recorded fires was detected on 15 April 2019 and declared extinguished on 8 May 2019.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 10,929 hectares (109.3 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire entered 2 municipalities: Del Nayar (10,505 ha, 2.0 %); Mezquitic (483 ha, 0.1 %).

What was the weather like?

During the fire the temperature reached 31.0 °C, humidity dropped to 12 % and gusts hit 53 km/h. The fire danger index (FWI) reached 45, class Very high.

Where does this data come from?

From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Mexico (geoBoundaries). It is not an official report.

MX · Mexico · 2019-04-15 → 2019-05-09

Del Nayar fire, April 2019 Del Nayar, Mezquitic

Out · last detection 9 May 2019, 19:31 UTC

The fire started on 15 April 2019 in Del Nayar, Mexico, and satellites saw it burning for 25 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 10,929 hectares from heat detections, spread across 2 municipalities. According to CONAFOR, the largest of the 2 recorded fires was detected on 15 April 2019 and declared extinguished on 8 May 2019.

It is the 7th largest in Nayarit since 2016 (of 181 with a page). Number 22 in Mexico in 2019, of 364.

Compare with…

Suggestions: Del Nayar · 2016 Del Nayar · 2017 Del Nayar · 2017 Del Nayar · 2017

Burnt area: 10,929ha; GWIS perimeter (Copernicus)
Duration: 25days; 15 Apr 2019 – 9 May 2019
Municipalities hit: 2; municipalities
Started on: 15 Apr; 2019
Heat detections: 587; in a single hotspot: 172 MW
Danger at start: 40; Very high · FWI index
Average daily power: 138MW; detected power per day, on average

HOTSPOTS BY DAY 15 Apr9 May

Play back 9 May 2019

How it evolved, day by day

15 Apr 19 Apr 24 Apr 26 Apr 28 Apr 2 May 7 May

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

The weather it burned in

31°high

53km/h · peak gust

12%lowest humidity

It had gone 27 days without rain (1 mm or more) when it started.

This area had burned before

40% of the perimeter overlaps earlier fires recorded since 2016: 2,443 ha in 2016, 2,164 ha in 2017, 141 ha in 2018. Part of it burned more than once, so the yearly figures add up to more than the 4,366 ha that had burned before.

How big is it?

It burned the equivalent of 6.9% of the area of London (109 km² against 1,583 km²).

London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).

This compares size, not location: both shapes are at the same scale, north up, centred on each other.

What happened to each town

Del Nayar where it started

10,505 ha reached on 15 Apr

2.0 %
Mezquitic

483 ha reached on 4 May

0.1 %

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 2020

Built-up area0.40 ha

Residents≈ 50

Inside the perimeter there were about 0.40 hectares of built-up land and about 50 residents (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

Official record

Several official records match this area

According to CONAFOR, 2 fires started inside this perimeter on these dates, totalling 13,582 ha (the satellite measured 10,929 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.

When each one burned

1 13,311 ha 2 271 ha

15 Apr7 May

negligence

1 Del Nayar Los Huicholes 15 April 2019 13,311 ha · extinguished on 8 May 2019 · cause: negligence
2 Mezquitic Hiucholes 15 April 2019 271 ha · extinguished on 8 May 2019 · cause: negligence

Total according to CONAFOR: 13,582 ha, 124 % of the 10,929 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.

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)
15 Apr	27.1 °C	18 %	44 km/h	0.0 mm	Very high 40
16 Apr	27.4 °C	24 %	45 km/h	0.0 mm	High 37
17 Apr	26.5 °C	23 %	50 km/h	0.0 mm	High 37
18 Apr	28.2 °C	14 %	42 km/h	0.0 mm	Very high 39
19 Apr	31.0 °C	12 %	52 km/h	0.0 mm	Very high 43
20 Apr	28.4 °C	19 %	49 km/h	0.0 mm	Very high 42
21 Apr	26.3 °C	24 %	50 km/h	0.0 mm	Very high 38
22 Apr	28.0 °C	17 %	51 km/h	0.0 mm	Very high 39
23 Apr	26.7 °C	18 %	46 km/h	0.0 mm	Very high 38
24 Apr	26.5 °C	13 %	52 km/h	0.0 mm	Very high 41
25 Apr	29.4 °C	12 %	50 km/h	0.0 mm	Very high 43
26 Apr	30.3 °C	17 %	45 km/h	0.0 mm	Very high 42
27 Apr	28.3 °C	14 %	51 km/h	0.0 mm	Very high 43
28 Apr	27.7 °C	16 %	50 km/h	0.0 mm	Very high 44
29 Apr	28.7 °C	19 %	50 km/h	0.0 mm	Very high 43
30 Apr	30.6 °C	13 %	46 km/h	0.1 mm	Very high 43
1 May	29.9 °C	18 %	45 km/h	0.0 mm	Very high 43
2 May	29.8 °C	19 %	50 km/h	0.0 mm	Very high 44
3 May	28.3 °C	17 %	52 km/h	0.0 mm	Very high 44
4 May	27.8 °C	17 %	51 km/h	0.0 mm	Very high 44
5 May	27.1 °C	18 %	49 km/h	0.0 mm	Very high 43
6 May	26.3 °C	15 %	52 km/h	0.0 mm	Very high 44
7 May	26.6 °C	14 %	53 km/h	0.0 mm	Very high 45
8 May	26.5 °C	12 %	52 km/h	0.0 mm	Very high 44
9 May	27.1 °C	15 %	53 km/h	0.0 mm	Very high 45
10 May after	27.6 °C	14 %	48 km/h	0.0 mm	Very high 44
11 May after	28.1 °C	20 %	52 km/h	0.0 mm	Very high 43
12 May after	26.7 °C	20 %	56 km/h	0.0 mm	Very high 43
13 May after	27.9 °C	14 %	52 km/h	0.0 mm	Very high 43
14 May after	29.0 °C	14 %	42 km/h	0.0 mm	Very high 41
15 May after	29.4 °C	12 %	39 km/h	0.0 mm	Very high 41
16 May after	29.4 °C	17 %	46 km/h	0.0 mm	Very high 44
17 May after	28.6 °C	21 %	50 km/h	0.0 mm	Very high 42
18 May after	27.4 °C	22 %	54 km/h	0.0 mm	Very high 42
19 May after	30.2 °C	12 %	53 km/h	0.0 mm	Very high 45

Before and after, from space

Drag the line to compare the same ground before the fire and after it.

↔

Before · 8 Apr 2019

After · 16 May 2019

Before After

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 · 587Every 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

All fires in Mexico ›

Frequently asked questions

How long did the Del Nayar fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 15 April 2019 to 9 May 2019 (25 days). The perimeter dates it from 15 April 2019 to 6 May 2019. According to CONAFOR, the largest of the 2 recorded fires was detected on 15 April 2019 and declared extinguished on 8 May 2019.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 10,929 hectares (109.3 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire entered 2 municipalities: Del Nayar (10,505 ha, 2.0 %); Mezquitic (483 ha, 0.1 %).
What was the weather like?: During the fire the temperature reached 31.0 °C, humidity dropped to 12 % and gusts hit 53 km/h. The fire danger index (FWI) reached 45, class Very high.
Where does this data come from?: From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Mexico (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: 911 · Emergency number and official warnings ›

CONAFOR · Comisión Nacional Forestal ↗
CENAPRED ↗

Satellite cross-check

NASA FIRMS ↗
GWIS · Copernicus ↗

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

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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.

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How we know this

Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery; 2 polygons grouped in this page.
Dates adjusted with the VIIRS detections inside the perimeter, which said 15 April 2019 to 6 May 2019. 587 Suomi-NPP VIIRS detections on those dates.
Compared with CONAFOR: 13,582 official ha against 10,929 ha of perimeter; they agree within 25%.
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 2020, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.

How we build fire pages: methodology ›

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 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.

Where it burned